53100 Revert “Roll engine 2d42c74a348d..fdf4f7883f67 (2 commits)” (cla: yes, engine)

53105 Implement DropdownButton and DropdownButtonFormField onTap callback (cla: yes, customer: money (g3), f: material design, framework, severe: new feature, waiting for tree to go green)

53113 Remove use of “implements Function” in tests. (cla: yes, f: material design, framework)

53118 Include metadata in GitHub crash template (a: triage improvements, cla: yes, tool)

53139 Move BuildSystem context fetch to globals.dart (cla: yes, team, tool)

53141 Convert analyze_test to testWithoutContext (cla: yes, team, tool)