Make sure we execute tests on LTS package for older LTS releases (PowerShell#17326)

Author: adityapatwardhan

tools/releaseBuild/azureDevOps/releaseBuild.yml

@@ -222,7 +222,7 @@ stages:
 
         - powershell: |
             $metadata = Get-Content '$(Build.SourcesDirectory)/tools/metadata.json' -Raw | ConvertFrom-Json
-            $LTS = $metadata.LTSRelease.Latest
+            $LTS = $metadata.LTSRelease.Package
             @{ ReleaseVersion = "$(Version)"; LTSRelease = $LTS } | ConvertTo-Json | Out-File "$(Build.StagingDirectory)\release.json"
             Get-Content "$(Build.StagingDirectory)\release.json"
             Write-Host "##vso[artifact.upload containerfolder=metadata;artifactname=metadata]$(Build.StagingDirectory)\release.json"