IImplementInterfaceService is implemented by calling a code action, but it should be the other way around

[tmat]

As a general rule Code Actions should be built on top of feature services, not the other way around.
The inversion adds dependencies to the feature implementation on Code Action infrastructure that shouldn't be necessary.
For example, moving the feature implementation out of proc would not be currently possible with this dependency.

Tracking TODOs in source.

[tmat]

@CyrusNajmabadi FYI