70327 [flutter_releases] Flutter 1.22.4 framework cherrypicks (a: tests, cla: yes, d: examples, engine, f: cupertino, f: material design, framework, team, tool)

70328 Revert “mark catalina ios tasks as flaky” (cla: yes, team, waiting for tree to go green)

70396 Set the mixWithOthers option in the Gallery video demo (cla: yes, team)

70407 Revert “Add SkiaPerfPoint and FlutterEngineMetricPoint” (cla: yes, team)

70412 [flutter_tools] Add bot configuration to run web_tool_tests for linux, mac, and windows (cla: yes, team, tool)

70419 Reland “Add SkiaPerfPoint and FlutterEngineMetricPoint (#70153)” (cla: yes, team)