Use matching architecture for GitHub Actions when pushing multi-arch images

[taylanisikdemir]

What changed?
I noticed the docker/build-push-action has been flaky for arm64 architecture (list of recent runs). It fails due to cross arch compilation issues that rely on qemu:

#45 867.4 github.com/jcmturner/dnsutils/v2: /usr/local/go/pkg/tool/linux_arm64/compile: signal: segmentation fault (core dumped)
#45 1027.9 make: *** [Makefile:513: cadence-server] Error 1
#45 ERROR: process "/bin/sh -c CGO_ENABLED=0 make cadence-cassandra-tool cadence-sql-tool cadence cadence-server cadence-bench cadence-canary" did not complete successfully: exit code: 2

We use always ubuntu x64 architecture runner to build images for both amd64 and arm64 architectures. It seems to be not stable with qemu emulator. I have seen others hitting similar issues.

Adding multiple architecture strategy to the jobs to mitigate this cross arch compilation stability issue.

strategy:
      matrix:
        os: [linux]
        arch: [x64, arm64]

The above will run the job twice. One time for arch=x64 and another one for arch=arm64.

The underlying runner's ubuntu image and docker's platform flag will be populated according to matrix.arch.