71378 [FloatingActionButtonLocation] Add proper formatting to documentation (cla: yes, d: api docs, f: material design, framework, waiting for tree to go green)

71401 Update documentation link (cla: yes, f: material design, framework, team)

71411 Add testing shard for release mode guard (cla: yes, framework, team, tool)

71417 [flutter_tools] do not validate unused services key (cla: yes, tool)

71424 Try to avoid more false-positives in people using this template (cla: yes, waiting for tree to go green)

71433 [flutter_tools] update some web configuration defaults (cla: yes, tool)

71434 [flutter_tools] allow hiding web server device, provide flags to re-enable (cla: yes, tool)