This adds avoid_dynamic_calls to the list of lints, and fixes all instances where it was violated.

Importantly, this lint is NOT turned on for flutter/packages/test, because those changes are happening in another PR: #84478

This reverts commit 027d4eca.

Revert "[flutter_tools] remove mocks, globals from golden comparator and test runner tests (#81423)" (#81487)

This reverts commit 8fe4cc79.

* opt out the flutter tool

* oops EOF

* fix import

* Update tool_backend.dart

* Update daemon_client.dart

* fix more

[flutter_tools] use initially parsed package config for language version, sound mode determination (#70323)

* [flutter_tools] null safety mode is used for dill naming

* add bad test case

* [flutter_test] handle breaking change to test main . Fixes #67382

Use the new single `src/platform.dart` import to pick up what is needed
to implement a test platform from both `test_api` and `test_core`.

Skip unnecessary parsing of chrome URI. Ensure stack traces are initialized in web server. Disclaimer on web server that it does not support debugging and remove help message. Fix generated entrypoint to check for main(List<String> args)

- Fixes #59643
- Fixes #55084
- Fixes #60417

Support --enable-experiment in flutter test (for flutter_tester). Required minor change for null safety.