Disable sourcelink validation in the build (#37324)

Now available in nightly runs and in the prep stage for releases

eng/pipelines/official/stages/publish.yml

@@ -30,6 +30,7 @@ stages:
     enableSymbolValidation: false
     enableSigningValidation: false
     enableNugetValidation: false
+    enableSourceLinkValidation: false
     SDLValidationParameters:
       enable: false
       artifactNames:
@@ -47,8 +48,5 @@ stages:
         -TsaCodebaseName "$(TsaCodebaseName)"
         -TsaPublish $True
     
-    # The following checks are not available after the build and continue to be run here
-    enableSourceLinkValidation: true
-    
     # Publish to blob storage.
     publishInstallersAndChecksums: true