This fixes a race condition in test/integration.shard/cache_test.dart which allowed the test to fail if the machine took a very long time to acquire a lock or launch a process.

This reverts commit a786f657.

This change adds some localizations for keyboard keys that will be used in creating shortcut descriptions in menus.

Part of #72926

Simplify SafeArea test for maintainBottomViewPadding to ensure maintainBottomViewPadding is always respected (#97646)

* Starts using the `--source` flag to compile the dart registrant.

* updated general.shard tests

* Fixed the resident compiler flow

* added integration test

* made the integration test self contained

* renamed generated_main to dart_plugin_registrant

* cleaned up for review

* added task runner for ci

* added bringup and TESTOWNERS

* updated failure message

This reverts commit c74a646b.

* e97c8016e Started looking for the dart plugin registrant at runtime  (flutter/engine#31418)

* 9ebbc6eb0 Standardize the embedder file name. (flutter/engine#31723)

* e983ac898 Roll Skia from 1fc0c1c0f8af to 5deac304821b (2 revisions) (flutter/engine#31725)

* afd334d9d added dart plugin registrant test executables to run_tests.py (flutter/engine#31726)

* 0ff508b54 Standardize embedder archive name. (flutter/engine#31693)

* 9c1daae1e Roll Fuchsia Mac SDK from qGsRXn7-D... to RIOZP5nXz... (flutter/engine#31730)

* ceec638bb Roll Fuchsia Linux SDK from _mwyhkd9H... to 7rB0Yrprs... (flutter/engine#31731)

* 54050b405 Roll Skia from 5deac304821b to c3e7a2a00b0a (3 revisions) (flutter/engine#31732)

* a5718ab3c Roll Dart SDK from c3e3126a598b to 34a5563af80d (6 revisions) (flutter/engine#31734)