Migrate to cargo_embargo. am: d051a08333 am: d440b696f3 am: 73b7841a27

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

Change-Id: I8168a6e2637a39e687dbd094921ccfc2b0b1dc29
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>