Move Mac_build_test flutter_gallery__transition_perf_e2e_ios to staging (#138196)

Seems that bots recently upgraded to macOS 13 are missing certs (https://github.com/flutter/flutter/issues/138194). Temporarily move `Mac_build_test flutter_gallery__transition_perf_e2e_ios` to staging.

.ci.yaml

@@ -4441,7 +4441,8 @@ targets:
 
   - name: Mac_build_test flutter_gallery__transition_perf_e2e_ios
     recipe: devicelab/devicelab_drone_build_test
-    presubmit: false
+    # TODO(vashworth): Take out of bringup once https://github.com/flutter/flutter/issues/138194 is resolved.
+    bringup: true
     timeout: 60
     properties:
       tags: >