26859 Revert “Issues/80711 reland (#26813)” (cla: yes)

26860 Reland ios accessibility scrolling support (platform-ios, cla: yes)

26868 Update cirrus gcloud credentials (cla: yes)

26870 Remove tech debt related to image disposal and layer GC (cla: yes)

26871 Roll Skia from 64751750f474 to 9f73b04b437d (10 revisions) (cla: yes, waiting for tree to go green)

26872 Roll Dart SDK from 77bc0eb4b39a to b260adefae51 (4 revisions) (cla: yes, waiting for tree to go green)