Sync eng/common directory with azure-sdk-tools for PR 12471 (Azure#3188)

Sync eng/common directory with azure-sdk-tools for PR
Azure/azure-sdk-tools#12471 See [eng/common
workflow](https://github.com/Azure/azure-sdk-tools/blob/main/eng/common/README.md#workflow)

Co-authored-by: Ben Broderick Phillips <[email protected]>

Author: azure-sdk

eng/common/scripts/job-matrix/Create-JobMatrix.ps1

@@ -54,7 +54,9 @@ LogGroupEnd
 $serialized = SerializePipelineMatrix $matrix
 
 Write-Host "Generated matrix:"
-Write-Host $serialized.pretty
+
+# Write-Output required to support other scripts that call this script directly
+Write-Output $serialized.pretty
 
 if ($CI) {
     Write-Output "##vso[task.setVariable variable=matrix;isOutput=true]$($serialized.compressed)"