R1:7d6d2c128a9a

Make "bin/audit delete" synchronize commit audit status, and improve "bin/audit synchronize" documentation

Summary:
Depends on D20126. See PHI1056. Ref T13244.

- `bin/audit delete` destroys audit requests, but does not update the overall audit state for associated commits. For example, if you destroy all audit requests for a commit, it does not move to "No Audit Required".
- `bin/audit synchronize` does this synchronize step, but is poorly documented.

Make `bin/audit delete` synchronize affected…