eolian: account for entire inheritance trees when compositing

eolian: account for entire inheritance trees when compositing

When a class composites an interface, we need to ignore all of
its extends (and extends of those) as well as the main interface
when doing API checks, as composites essentially provides a
guarantee that this *will* be implemented at runtime, which
further extends to the whole inheritance tree of that interface.

Fixes T8491.