51944 enable avoid_single_cascade_in_expression_statements (cla: yes, framework)

51946 Updated package:test, package:test_core, package:coverage, package:package_config (cla: yes, team, tool, waiting for tree to go green)

51952 [gen_l10n] Escape quote characters in ARB files (a: internationalization, cla: yes, severe: regression, team, tool, waiting for tree to go green)

51960 Revert “Reland: [flutter_tool] Where possible, catch only subtypes of Exception” (cla: yes, tool)

51962 Increase the timeout for the cull_opacity_perf_test to 45 seconds (cla: yes, team, waiting for tree to go green)

51963 Skip iOS project migration when script is already embedding frameworks (cla: yes, tool)