YJIT: Invalidate redefined methods only through cme

[k0kubun]

We currently invalidate redefined methods in two different ways: klass and cme. If we modify the invalidation logic in C (clear_method_cache_by_id_in_class) a little, we could always do that through cme, which allows us to save some memory.

This contributes to reducing YJIT's memory consumption on railsbench (23.3MB -> 22.2MB):

Before

inline_code_size:         4845340
outlined_code_size:       4843608
freed_code_size:                0
yjit_alloc_size:         23284693

After

inline_code_size:         4843240
outlined_code_size:       4842316
freed_code_size:                0
yjit_alloc_size:         22198049

[maximecb]

Looks like a nice simplification 👍 Thank you for looking into things like this 🙏

@XrXr can you review this as well?

[XrXr]

Should be good if CI passes 👍🏼