(CAT-1991) - Warn on invalid dir

This commit updates the initialize method in Pwsh::Manager to only warn
not raise on invalid_directory returning true.

Author: jordanbreen28

lib/pwsh.rb

@@ -108,7 +108,7 @@ def initialize(cmd, args = [], options = {})
       @powershell_command = cmd
       @powershell_arguments = args
 
-      raise "Bad configuration for ENV['lib']=#{ENV['lib']} - invalid path" if Pwsh::Util.invalid_directories?(ENV['lib'])
+      warn "Bad configuration for ENV['lib']=#{ENV['lib']} - invalid path" if Pwsh::Util.invalid_directories?(ENV['lib'])
 
       if Pwsh::Util.on_windows?
         # Named pipes under Windows will automatically be mounted in \\.\pipe\...