Migrate to cargo_embargo. am: e69b1970fd am: c76cc6ca3a am: 75631a96b1

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

Change-Id: I029715fb7f5b5c491812d01bf8c1b17866214f82
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>