* Improve `useMaterial3` documentation

* reverse styles and components

* tweak language around support

* Update theme_data.dart

* remove trailing space

* Update packages/flutter/lib/src/material/theme_data.dart
Co-authored-by: Darren Austin <darren@darrenaustin.org>

* add missing spec links

* remove spec links from useMaterial3

* move defaults section up, rejig things

* spaces no longer trailing

* spaces no longer trailing (2)
Co-authored-by: Darren Austin <darren@darrenaustin.org>

* Add targets for benchmark tests moved from staging to prod.

* Add bringup:true to new targets.

* Missed a builder for bringup.

* Fix a presubmit that was inadvertently created as true.

* Removed some trailing whitespace causing format check to fail.

* Added standard IconButton for M3 with new ButtonStyle field

* Added IconButton examples for standard, filled, filled_tonal, and outlined types
Co-authored-by: Qun Cheng <quncheng@google.com>