Skip optimized method check for most method IDs

Previously every time a method was defined on a module, we would
recursively walk all subclasses to see if the module was included in a
class which the VM optimizes for (such as Integer#+).

For most method definitions we can tell immediately that this won't be
the case based on the method's name. To do this we just keep a hash with
method IDs of optimized methods and if our new method isn't in that list
we don't need to check subclasses at all.

internal.h

@@ -2282,6 +2282,7 @@ const char *rb_source_location_cstr(int *pline);
 MJIT_STATIC void rb_vm_pop_cfunc_frame(void);
 int rb_vm_add_root_module(ID id, VALUE module);
 void rb_vm_check_redefinition_by_prepend(VALUE klass);
+int rb_vm_check_optimizable_mid(VALUE mid);
 VALUE rb_yield_refine_block(VALUE refinement, VALUE refinements);
 MJIT_STATIC VALUE ruby_vm_special_exception_copy(VALUE);
 PUREFUNC(st_table *rb_vm_fstring_table(void));