Migrate to cargo_embargo. am: 147d7ea1fc am: e1d1b7766f am: 2a622c7040

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/codespan-reporting/+/2822238

Change-Id: I1bfd080b92b0f40d2b9da0caab73396c662799fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>