Cupertino localization step 7: modularize material specific things out of gen_localizations.dart (#29822)

Cupertino localization step 6: add a GlobalCupertinoLocalizations base class with date time formatting (#29767)

Cupertino localization step 3: in-place move some material tools around to make room for cupertino (#29644)

* add trailing commas on list/map/parameters

* add trailing commas on Invocation with nb of arg>1

* add commas for widget containing widgets

* add trailing commas if instantiation contains trailing comma

* revert bad change

* remove ignore_for_file lints

* update comments

* remove example

* add missing entry to material_mr.arb

* Make progress indicators accessible

We have templates now.

This reverts commit 80f80ab0.

For G3 Roll:

* Revert "MaterialButton must honor its minWidth and height parameters (#22919)"

This reverts commit a0233233.

* Revert "Update uses of ButtonTheme.bar: pass along the current Theme's colorScheme (#22827)"

This reverts commit 655bf6a2.

* Revert "ButtonTheme.of().colorScheme defers to Theme (#22880)"

This reverts commit a590940e.

* Revert "Bring TextTheme into alignment with the current Material spec (#22330)"

This reverts commit 8bfb4b3e.

* Revert "Added ColorScheme, updated ThemeData, ButtonTheme, material buttons (#22013)"

This reverts commit eea3465a.

* Manual adjustments to fix reversion issues.

Replaced about 535 "TBD" translations with the real thing.

Added remainingTextFieldCharacterCountTwo, remainingTextFieldCharacterCountMany, remainingTextFieldCharacterCountFew, to GlobalMaterialLocalizations

* enable lint unnecessary_new

* fix tests

* fix tests

* fix tests