Migrate to cargo_embargo. am: d051a08333

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pest_derive/+/2821938

Change-Id: I5b0b8600ec98bafebfd93093c145be39fc175434
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>