flutter-tool: enum cleanup

[flutter_tools] generate empty plugin registrants for winuwp and fix local engine for winuwp_ (#79827)

* opt out the flutter tool

* oops EOF

* fix import

* Update tool_backend.dart

* Update daemon_client.dart

* fix more

Revert "[flutter_tools] separate target platform, host platform, and architecutre (#60119)" (#60147)

This reverts commit 30d97d89.

separate target platform, host platform, and architecture

Adds support for --bundle-sksl-path to windows, linux, macOS, and iOS.

Fixes #53115

Instead of targets/dart.dart -> targets/common.dart

Builds and bundles an 'app.so' containing AOT data, and downloads and packages the release/profile artifacts for those builds, rather than always using the debug artifacts.

Fixes https://github.com/flutter/flutter/issues/38477
Fixes https://github.com/flutter/flutter/issues/39664

To simplify development of the in-progress GTK embedding, which will
replace the GLFW embedding on Linux, add the GTK artifacts to the unpack
list. This means that until the transition, both the GLFW and GTK
artifacts will be unpacked.

Part of #54860

- Update windows precache to include placeholder profile/release artifacts
- Update Linux and windows unpack to account for the cpp_client_wrapper code to live separate from the engine binaries
- Cleanup testing in unpack_linux and remove test cases that are covered in build_system_test.dart

* Update project.pbxproj files to say Flutter rather than Chromium

Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.

* Update the copyright notice checker to require a standard notice on all files

* Update copyrights on Dart files. (This was a mechanical commit.)

* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.

Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).

* Clean up the copyrights in non-Dart files. (Manual edits.)

Also, make sure templates don't have copyrights.

* Fix some more ORGANIZATIONNAMEs

Pulls the Win32 embedding artifacts instead of the GLFW versions for
Windows.

Fixes #38590

This reverts commit 5e7beaf7.

Switch from the un-suffixed Windows and Linux libraries to the
_glfw-suffixed versions, in preparation for having non-GLFW versions
using the previous library/wrapper names.

Part of #38589