Migrate to cargo_embargo. am: e69b1970fd am: 57863ac504 am: 87fd60706c

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pest/+/2822119

Change-Id: I7dbbcaa95c8f48e50941867a05c0f264f0c9d098
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>