Move inline caches GC handling in JitCodeCache.

Make the classes they hold weak references and visit
them during SweepJitRoots.

This fixes the newly introduced deadlock:

Thread1:
1) Lock JitCodeCache lock to create Profiling info for
  ArtMethod m.
2) m is a copied method, we need to track the actual holder,
   needing to decode a weak reference.
3) Weak references are not accessible due to GC.

GC Thread:
- Disallow weak reference access.
- Wait for checkpoint.

Thread2:
- Try to lock JitCodeCache lock
- Deadlock, as Thread1 owns the JitCodeCache lock.

Test: test-art-host
bug: 31289185
bug: 33198826

Change-Id: I7ee17631015450ace8d2a0264415a81c5a902bb8