Merge all native platform specific workflows into 1 again

.github/actions/Miscellaneous/Install_Dependencies/action.yml

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+name: 'Install Dependencies'
+description: 'This PR installs the dependencies needed'
+
+runs:
+  using: composite
+  steps:
+
+    - name: Install dependencies on MacOS
+      if: runner.os == 'macOS'
+      shell: bash
+      run: |
+        brew update --force
+        if [[ "$(uname -m)" == "x86_64" ]]; then
+          brew remove swiftlint
+        else
+          brew remove unxip
+        fi
+        # workaround for https://github.com/actions/setup-python/issues/577
+        for pkg in $(brew list | grep '^python@'); do
+          brew unlink "$pkg"
+          brew link --overwrite "$pkg"
+        done
+        brew upgrade openssl >/dev/null 2>&1
+        brew upgrade --force
+        brew install ninja
+        brew install eigen
+        brew install boost
+        brew install gnu-sed
+        pip install distro pytest
+
+    - name: Install dependencies on Linux
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        # Install deps
+        sudo apt-get update
+        sudo apt-get install valgrind ninja-build
+        sudo apt-get install git g++ debhelper devscripts gnupg python3 doxygen graphviz python3-sphinx
+        sudo apt-get install -y libc6-dbg
+        sudo apt-get install valgrind
+        sudo apt autoremove
+        sudo apt clean
+        # Install libraries used by the cppyy test suite
+        sudo apt install libeigen3-dev
+        sudo apt install libboost-all-dev
+
+
+    - name: Install dependencies on Windows
+      if: runner.os == 'Windows'
+      shell: powershell
+      run: |
+        choco install findutils
+        $env:PATH="C:\Program Files (x86)\GnuWin32\bin;$env:PATH"
+

.github/actions/Miscellaneous/Save_PR_Info/action.yml

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+name: 'Save PR Info'
+description: 'This PR saves the PR Info for the job'
+
+runs:
+  using: composite
+  steps:
+
+    - name: Save PR Info on Unix Systems
+      if: ${{ runner.os != 'Windows' }}
+      shell: bash
+      run: |
+        mkdir -p ./pr
+        echo ${{ github.event.number }} > ./pr/NR
+        echo ${{ github.repository }} > ./pr/REPO
+
+        cling_on=$(echo "${{ matrix.cling }}" | tr '[:lower:]' '[:upper:]')
+        if [[ "$cling_on" == "ON" ]]; then
+          export CLING_HASH=$(git ls-remote https://github.com/root-project/cling.git refs/tags/v${{ matrix.cling-version }} | tr '\t' '-')
+          export LLVM_HASH=$(git ls-remote https://github.com/root-project/llvm-project.git cling-llvm${{ matrix.clang-runtime}} | tr '\t' '-')
+        else
+          export CLING_HASH="Repl"
+          # May need to revert back to both having same llvm_hash, as below cause llvm to be rebuilt everytime commit is made to llvm/llvm-project for release a.x
+          # which could be quite often for new releases
+          export LLVM_HASH=$(git ls-remote https://github.com/llvm/llvm-project.git refs/heads/release/${{ matrix.clang-runtime}}.x | tr '\t' '-')
+        fi
+
+        echo "CLING_HASH=$CLING_HASH" >> $GITHUB_ENV
+        echo "LLVM_HASH=$LLVM_HASH" >> $GITHUB_ENV
+
+    - name: Save PR Info on Windows systems
+      if: runner.os == 'Windows'
+      shell: powershell
+      run: |
+        #can be found
+        mkdir  ./pr
+        echo "${{ github.event.number }}" > ./pr/NR
+        echo ${{ github.repository }} > ./pr/REPO
+
+        if ( "${{ matrix.cling }}" -imatch "On" )
+        {
+          $env:CLING_HASH_TEMP = ( git ls-remote https://github.com/root-project/cling.git refs/tags/v${{ matrix.cling-version }} )
+          $env:CLING_HASH = $env:CLING_HASH_TEMP -replace "\t","-"
+        }
+        else
+        {
+          $env:CLING_HASH="Repl"
+          # May need to revert back to both having same llvm_hash, as below cause llvm to be rebuilt everytime commit is made to llvm/llvm-project for release a.x
+          # which could be quite often for new releases
+          $env:LLVM_HASH_TEMP = (git ls-remote https://github.com/llvm/llvm-project.git refs/heads/release/${{ matrix.clang-runtime}}.x )
+          $env:LLVM_HASH = $env:LLVM_HASH_TEMP -replace "\t","-"
+        }
+
+        echo "CLING_HASH=$env:CLING_HASH"
+        echo "LLVM_HASH=$env:LLVM_HASH"
+
+        echo "CLING_HASH=$env:CLING_HASH" >> $GITHUB_ENV
+        echo "LLVM_HASH=$env:LLVM_HASH" >> $GITHUB_ENV

.github/actions/Miscellaneous/Select_Default_Build_Type/action.yml

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+name: 'Select Default Build Type'
+description: 'This action selects the default build typose'
+
+runs:
+  using: composite
+  steps:
+    - name: Select default build type of Unix Systems
+      if: runner.os != 'Windows'
+      shell: bash
+      run: |
+        echo "BUILD_TYPE=Release" >> $GITHUB_ENV
+        echo "CODE_COVERAGE=0" >> $GITHUB_ENV
+        echo "ncpus=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV
+
+    - name: Select default build type on Windows
+      if: runner.os == 'Windows'
+      shell: powershell
+      run: |
+        echo "BUILD_TYPE=Release" >> $env:GITHUB_ENV
+        echo "CODE_COVERAGE=0" >>  $env:GITHUB_ENV
+        $env:ncpus=$([Environment]::ProcessorCount)
+        echo "ncpus=$env:ncpus" >> $env:GITHUB_ENV
+

.github/actions/Miscellaneous/Setup_Compiler/action.yml

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+name: 'Setup Compiler'
+description: 'This PR sets up the compiler for the job'
+
+runs:
+  using: composite
+  steps:
+
+    - name: Setup Compiler on MacOS
+      if: runner.os == 'macOS'
+      shell: bash
+      run: |
+        vers="${compiler#*-}"
+        if [[ "${{ matrix.compiler }}" == *"gcc"* ]]; then
+          brew install "gcc@$vers"
+          echo "CC=gcc-${vers}" >> $GITHUB_ENV
+          echo "CXX=g++-${vers}" >> $GITHUB_ENV
+        else
+          brew install llvm@15
+          if [[ "$(uname -m)" == "x86_64" ]]; then
+            echo "CC=/usr/local/opt/llvm@15/bin/clang" >> $GITHUB_ENV
+            echo "CXX=/usr/local/opt/llvm@15/bin/clang++" >> $GITHUB_ENV
+          else
+            echo "CC=/opt/homebrew/opt/llvm@15/bin/clang" >> $GITHUB_ENV
+            echo "CXX=/opt/homebrew/opt/llvm@15/bin/clang++" >> $GITHUB_ENV
+          fi
+        fi
+        echo "SDKROOT=$(xcrun --sdk macosx --show-sdk-path)" >> $GITHUB_ENV
+      env:
+        compiler: ${{ matrix.compiler }}
+
+    - name: Setup Compiler on Linux
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        # https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html
+        vers="${compiler#*-}"
+        os_codename="`cat /etc/os-release | grep UBUNTU_CODENAME | cut -d = -f 2`"
+        if [[ "${{ matrix.compiler }}" == *"gcc"* ]]; then
+          sudo apt install -y gcc-${vers} g++-${vers} lld
+          echo "CC=gcc-${vers}" >> $GITHUB_ENV
+          echo "CXX=g++-${vers}" >> $GITHUB_ENV
+        else
+          if ! sudo apt install -y clang-${vers}; then
+            curl https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+            echo "deb https://apt.llvm.org/${os_codename}/ llvm-toolchain-${os_codename}-${vers} main" | sudo tee -a /etc/apt/sources.list
+            sudo apt-get update
+            sudo apt-get install -y clang-${vers}
+          fi
+          echo "CC=clang-${vers}" >> $GITHUB_ENV
+          echo "CXX=clang++-${vers}" >> $GITHUB_ENV
+        fi
+      env:
+        compiler: ${{ matrix.compiler }}
+
+    - name: Save Compiler on Windows Systems
+      if: runner.os == 'Windows'
+      shell: powershell
+      run: |
+        if ( "${{ matrix.compiler }}" -imatch "clang" )
+        {
+          $ver="${{ matrix.compiler }}".split("-")[1]
+          choco install llvm --version=$ver --no-progress -my
+          clang --version
+          #
+          $env:CC="clang"
+          $env:CXX="clang++"
+          echo "CC=clang" >> $env:GITHUB_ENV
+          echo "CXX=clang++" >> $env:GITHUB_ENV
+        }
+        elseif ( "${{ matrix.compiler }}" -imatch "msvc" )
+        {
+          # MSVC is builtin in container image
+        }
+        else
+        {
+          echo "Unsupported compiler - fix YAML file"
+        }