Revert "Correct libraries path and remove dart:io and dart:isolate for web dart platform (#39364)" (#39985)

This reverts commit 3f4d27c4.

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

Fixes #38590

Avoids unnecessarily breaking projects that have another .xcodeproj in
their macos/ directory, which worked until the addition of the getInfo
call.

* Register getFlutterVersion service in flutter_tools.

* Add short revision ids to response.

* Rename method and remove obsolete comments.

* Fix broken test by adding sendPeerNotifications flag.

* Implement mockPeer.sendNotification.

This reverts commit 72cacb40.

This reverts commit 5e7beaf7.

* WIP on web plugin registry

* WIP on registering plugins

* WIP on web plugin registration

* Only generate `package:flutter_web_plugins` imports if plugins are
defined

* Add parsing test

* Add documentation

* Fix analyzer warnings

* add license headers

* Add tests for package:flutter_web_plugins

* Run `flutter update-packages --force-upgrade`

* Fix analyzer errors

* Fix analyzer error in test

* Update copyright and remove flutter SDK constraints

* Enable tests since engine has rolled

* add flutter_web_plugins tests to bots

* Create an empty .packages file for WebFs test

The Current->A symlink in a framework shouldn't have a trailing slash;
some versions of codesigning consider the version with a trailing slash
unsignable.