Revert "Remove endpoint parameter in repository resources (#19652)" (#19676)

This reverts commit 687a0d4.

Author: Maxim Zaytsev

Diff for: azure-pipelines.yml

@@ -9,10 +9,12 @@ resources:
   repositories:
   - repository: AzureDevOps
     type: git
+    endpoint: AzureDevOps
     name: AzureDevOps/AzureDevOps
 
   - repository: ConfigChange
     type: git
+    endpoint: AzureDevOps
     name: AzureDevOps/AzureDevOps.ConfigChange
 
   - repository: 1ESPipelineTemplates