Don't validate extension during publish step (#7725)

* Don't validate extension during publish step

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: peterwald

azure-pipelines.yml

@@ -383,4 +383,4 @@ extends:
               fileType: vsix
               vsixFile: '$(Pipeline.Workspace)\AzureDevOpsExtension\Microsoft.Extensions.AI.Evaluation.Reporting.vsix'
               useV5: true
-              validateExtension: true              
+              validateExtension: false