This allows us to get rid of some interim hacks.

Also had to add a patch to protobuf to properly quote arguments for the `copy` command. This usage of `copy` is no longer there on protobuf main, and our version is pretty old, so no need to upstream anything.

Closes #23450.

PiperOrigin-RevId: 668806857
Change-Id: I4728aac86ec748bd65deb1bba7ce19dcbf34ba5d