[hooks_runner] Support `dev_dependencies` in `dart test` and `flutter test`

[dcharkes]

Currently, any packages in dev_dependencies with native assets will not have their native assets built for flutter run, flutter build, etc. This WAI.

However, in flutter test and dart test the dev dependencies can be used. So the assets need to be built for the dev dependencies.

This means the API for the hooks_runner needs to change from not only having a rootPackageName but also a bool whether dev dependencies need to be included. Note that dev dependencies of dev dependencies should be ignored.

This impacts the flow of metadata from build hook to build hook. We don't want different metadata in test runs vs non-test runs. Metadata is only accessible of direct dependencies, not dev dependencies. This means the caches for hooks should not be invalidate when running flutter test and flutter build interleaved.

Marking as v1.0. This will not influence the protocol, but it would be weird if we don't support dev dependencies with native assets used in dart test and flutter test.