Disable tests on verification stage (#3695)

Author: benrr101

eng/pipelines/dotnet-sqlclient-signing-pipeline.yml

@@ -163,13 +163,14 @@ extends:
             patterns: '**/*.*nupkg'
             displayName: 'Download NuGet Package'
 
-      - template: eng/pipelines/common/templates/jobs/run-tests-package-reference-job.yml@self
-        parameters:
-          packageFolderName: $(packageFolderName)
-          isPreview: ${{ parameters['isPreview'] }}
-          timeout: ${{ parameters.testsTimeout }}
-          downloadPackageStep:
-            download: current
-            artifact: $(packageFolderName)
-            patterns: '**/*.nupkg'
-            displayName: 'Download NuGet Package'
+# Disabling as of 10/15/2025 due to OneBranch apparently disallowing MSBuild tasks in validation stages.
+#      - template: eng/pipelines/common/templates/jobs/run-tests-package-reference-job.yml@self
+#        parameters:
+#          packageFolderName: $(packageFolderName)
+#          isPreview: ${{ parameters['isPreview'] }}
+#          timeout: ${{ parameters.testsTimeout }}
+#          downloadPackageStep:
+#            download: current
+#            artifact: $(packageFolderName)
+#            patterns: '**/*.nupkg'
+#            displayName: 'Download NuGet Package'