Optimize callcache invalidation for refinements

Fixes [Bug #21201]

This change addresses a performance regression where defining methods
inside `refine` blocks caused severe slowdowns. The issue was due to
`rb_clear_all_refinement_method_cache()` triggering a full object
space scan via `rb_objspace_each_objects` to find and invalidate
affected callcaches, which is very inefficient.

To fix this, I introduce `vm->cc_refinement_table` to track
callcaches related to refinements. This allows us to invalidate
only the necessary callcaches without scanning the entire heap,
resulting in significant performance improvement.

st.c

@@ -2465,6 +2465,12 @@ set_init_numtable(void)
     return set_init_table_with_size(NULL, &type_numhash, 0);
 }
 
+set_table *
+set_init_numtable_with_size(st_index_t size)
+{
+    return set_init_table_with_size(NULL, &type_numhash, size);
+}
+
 size_t
 set_table_size(const struct set_table *tbl)
 {