In kotlin 2 the testFixtures configurations no longer seem to related
to the implementation/testImplementation configurations. So this
explicitly copies all implementation dependencies to
testFixturesImplementation,
and copies testFixtureImplementation dependencies to testImplementation.
This is a mechanical change that will be cleaned up at some future time
to
remove unnecessary dependencies.

GitOrigin-RevId: e491c46d9b6000d633046c2c6e0afa4b9ea93713