After native-context-independent codegen, verify that the resulting
Code object does not embed any nc-dependent objects, and that no code
dependencies have been created.

Bug: v8:8888
Change-Id: I894e74b27e86e7727ff17aa0dbfdd908373a5e55
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2284498
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68757}