75024 Clarify performance overlay in performance issue template (cla: yes, waiting for tree to go green)

75026 Bump flutter_gallery_assets (cla: yes, team, tool, waiting for tree to go green)

75027 [flutter_tools] switch dart defines to base64 to avoid windows control characters (cla: yes, tool)

75029 Migrate off e2e (cla: yes, team, tool, waiting for tree to go green)

75030 Revert “NNBD integration_test” (a: tests, cla: yes, framework, team)

75032 Text Editing Movement Keys via Shortcuts (cla: yes, f: material design, framework)

75033 Split tools_tests subshards into separate shards to support sub-sub-sharding (cla: yes, team, waiting for tree to go green)