58648 Add iOS new gallery perf test (cla: yes, severe: performance, team, waiting for tree to go green)

58820 Timeline summary contains CPU, GPU and Memory usage (a: tests, cla: yes, framework, severe: performance, waiting for tree to go green)

59803 Add benchmark for Mouse region (web) (a: tests, cla: yes, framework, severe: performance, team, waiting for tree to go green)

59883 Refactor mouse hit testing system: Direct mouse hit test (a: mouse, cla: yes, f: material design, framework, severe: performance, waiting for tree to go green)

59932 Add SkSL shader warm-up tests to Flutter gallery (cla: yes, perf: speed, severe: performance, team, waiting for tree to go green)

severe: API break - 11 pull request(s)