* Adds support for `flutter test --wasm`.
* The test compilation flow is a bit different now, so that it supports compilers other than DDC. Specifically, when we run a set of unit tests, we generate a "switchboard" main function that imports each unit test and runs the main function for a specific one based off of a value set by the JS bootstrapping code. This way, there is one compile step and the same compile output is invoked for each unit test file.
* Also, removes all references to `dart:html` from flutter/flutter.
* Adds CI steps for running the framework unit tests with dart2wasm+skwasm
* These steps are marked as `bringup: true`, so we don't know what kind of failures they will result in. Any failures they have will not block the tree at all yet while we're still in `bringup: true`. Once this PR is merged, I plan on looking at any failures and either fixing them or disabling them so we can get these CI steps running on presubmit.
This fixes https://github.com/flutter/flutter/issues/126692
* Fix screenshot testing for flutter web integration_test
* update packages
* fix method signature and todo
* Run tests on CI
* fix type
* remove silences
* Add docs
* fix comment
* fix whitespace
* review comments
* adding tests that uses integration_test (e2e) package to flutter
* change the package name for the import
* fix licenses. fix README commands. add links
* adding dependency change auto generated by the tool
* more analyzer error fixes
