fix(mysql): quote groups reserved word in query replacer

[backkem]

Fixes #4579

groups is a reserved word in MySQL >= 8.0.2. Migration 13 (from #4456) fails with:

migration 13 statement 2 failed: Error 1064 (42000): ... right syntax to use near 'groups blob'

Additionally, since MySQL auto-commits DDL, statement 1 (preferred_username) is persisted
despite the transaction rollback, leaving the migration in an unrecoverable state on restart.

Fix

Add groups to the existing reserved word quoting regex in flavorMySQL.queryReplacers,
alongside keys which is already handled.

Recovery

Users stuck with a half-applied migration 13 need to drop the orphaned column before restarting:

ALTER TABLE password DROP COLUMN preferred_username;

[backkem]

cc @nabokihms . IDK if you're open to cutting a patch release for something like this?

[nabokihms]

Thanks, we will wait a little longer for the other bugs and then release a patch.