In order to avoid unnecessary conversions to CodeT and back this CL:
- makes compiler::CompileCWasmEntry() return CodeT,
- makes Execution::CallWasm() accept CodeT.

Bug: v8:11880
Change-Id: Ic4b7b5f476c6efcfca4bc116ecd45cdee9f0c6c3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2971743Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75247}