Provide a flag for controlling the dart2js optimization level when building for web targets (#101945)

This reverts commit 5fd259be.

* opt out the flutter tool

* oops EOF

* fix import

* Update tool_backend.dart

* Update daemon_client.dart

* fix more

Support --web-renderer options which would allow user to specify which rendering backend to use. (#68848)

Overhaul of flutter drive in order to deliver a better experience, namely:

* flutter run and flutter drive now share more flags, so code paths that were previously only testable on run are now testable on drive.
* Removes web-initialize-platform as this is no longer used
* flutter drive correctly sets up a logger that shows native exceptions, by connecting to the vm service.
* VM service connection now provides access to memory info without launching devtools (only for debug/profile mode)

Web changes

* Passes on the one test in the repo, otherwise the webdriver code has been isolated as much as possible

Additional NNBD related bug fixes:

No longer passes --enable-experiment to the test script. (FYI @blasten ). earlier we might have assumed that the flutter gallery benchmarks would be migrated along side the app and flutter driver, but only the app under test needs to be migrated. The test scripts should never be run with the experiment.

Revert "[flutter_tools] refactor drive launch into separate service, split by mobile+desktop and web (#68451)" (#68845)

This reverts commit 2e75f52a.

[flutter_tools] refactor drive launch into separate service, split by mobile+desktop and web (#68451)

Overhaul of flutter drive in order to deliver a better experience, namely:

flutter run and flutter drive now share more flags, so code paths that were previously only testable on run are now testable on drive.
Removes web-initialize-platform as this is no longer used
flutter drive correctly sets up a logger that shows native exceptions, by connecting to the vm service.
VM service connection now provides access to memory info without launching devtools (only for debug/profile mode)
Web changes

Passes on the one test in the repo, otherwise the webdriver code has been isolated as much as possible

Additional NNBD related bug fixes:

No longer passes --enable-experiment to the test script. (FYI @blasten ). earlier we might have assumed that the flutter gallery benchmarks would be migrated along side the app and flutter driver, but only the app under test needs to be migrated. The test scripts should never be run with the experiment.

HACKTOBERFEST

[flutter_tools] disable source maps by default for release builds, enable for run and with command line arg (#67331)

Disables source map production by default for build web. For web builds performed as a part of flutter run --release, enable the source maps, or allow force enabling with --source-maps command line flag.

fixes #67328

Fix run release/profile modes generating a full service worker.

Some of the null-safety commands were missing - plumb them through. Ensure that verbose mode shows their output, and clean up the messaging around sound-null-safety.

Fixes #59769

Adds a test that validate each of the null safety supporting build commands has everything plumbed through.

Also combines experiments into extraGenSnapshot/ExtraFrontEndOptions. Allows providing --no-sound-null-safety to allow out of order migration and running.

Fixes the performance issue with tree-shake-icons and filters to ttf mime type. Does not change default or error behavior.

Revert "[flutter_tools] Allow providing dart-defines to Android, iOS, macOS builds (#51714)" (#52041)

This reverts commit ee60eeea.

* 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