AuthN large table cleanup: finalize BBMs for com

This is part of #555382.

Scope

As part of the large table cleanup for the tables under AuthN domain, we've implemented a soft-deletion mechanism using archival tables (*_archived_records). We've also created BBMs (Gitlab::BackgroundMigration::Archive*) and workers (Authn::DataRetention::*Worker) for ongoing cleanup. Now that we've confirmed its stability, we will finalize the BBMs for com, according to our process (Finalize a batched background migration)

Steps

• Finalize BBMs for com
• Can be handled in a single MR, but each finalization needs its own migration

BBMs list:

• Gitlab::BackgroundMigration::ArchiveRevokedAccessGrants
• Gitlab::BackgroundMigration::ArchiveRevokedAccessTokens
• Gitlab::BackgroundMigration::ArchiveAuthenticationEvents