Drive-by:
* don't create proto handlers for DefineOwnIC and StoreOwnIC,
* make sure that none of the DefineOwnIC and StoreOwnIC handlers are
  leaked into StoreIC's megamorphic stub cache.

Bug: v8:9888, chromium:1259950
Change-Id: I9db538e6ed14bc578aa80df037ffebd9e8c3c649
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3250641
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77632}