72046 Add footer to CupertinoFormSection and fix CupertinoFormSection margins. (cla: yes, f: cupertino, framework, waiting for tree to go green)

72079 [flutter_releases] Flutter Framework Stable 1.22.5 cherrypicks (a: tests, cla: yes, d: examples, engine, f: cupertino, f: material design, framework, team, tool)

72316 Remove Scrollbar.isAlwaysShown assert based on Scrollbar.controller (a: quality, cla: yes, f: cupertino, f: material design, f: scrolling, framework, severe: new feature, waiting for tree to go green)

72384 Fix cupertino icons mapping which was misaligned by 1 (cla: yes, f: cupertino, framework, team)