Migrate to cargo_embargo. am: e69b1970fd am: c76cc6ca3a

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

Change-Id: Icfcd751170d1b46f1c9014c37429c111e52f8583
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>