67900 Expose date symbols and patterns for en_US in framework (a: internationalization, cla: yes, f: material design, framework, team)

68074 Added CupertinoSearchTextField (a: internationalization, cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)

68206 [gen_l10n] Create pubspec.yaml in “.dart_tool/flutter_gen” if it does not already exist (a: internationalization, cla: yes, tool)

68302 enable unnecessary_string_escapes and use_raw_strings (a: internationalization, a: tests, cla: yes, f: cupertino, f: material design, framework, team, tool, waiting for tree to go green)

68374 Fix links to GitHub bug template (a: internationalization, cla: yes, framework, waiting for tree to go green)