Marks Mac_ios platform_views_scroll_perf_non_intersecting_impeller_ios__timeline_summary to be unflaky (#116668)

Author: fluttergithubbot

.ci.yaml

@@ -3789,7 +3789,6 @@ targets:
   - name: Mac_ios platform_views_scroll_perf_non_intersecting_impeller_ios__timeline_summary
     recipe: devicelab/devicelab_drone
     presubmit: false
-    bringup: true
     timeout: 60
     properties:
       tags: >