Revert "Switch Linux_build_test flutter_gallery__transition_perf back to bringup" (#110734)

Author: keyonghan

.ci.yaml

@@ -1935,7 +1935,6 @@ targets:
   - name: Linux_build_test flutter_gallery__transition_perf
     recipe: devicelab/devicelab_drone_build_test
     presubmit: false
-    bringup: true # New target https://github.com/flutter/flutter/issues/103542
     timeout: 60
     properties:
       tags: >