Fix bug of branches API with tests(#25578) (#25579)

Backport #25578 

This PR added a repository's check when creating/deleting branches via
API. Mirror repository and archive repository cannot do that.

templates/swagger/v1_json.tmpl

@@ -3478,6 +3478,9 @@
           "201": {
             "$ref": "#/responses/Branch"
           },
+          "403": {
+            "description": "The branch is archived or a mirror."
+          },
           "404": {
             "description": "The old branch does not exist."
           },