Rate-limit all emails sent, fix GHCR tags issue, and change "Smartphone" to "Authenticator"

What's Changed

• don't push branch tags to GHCR because it doesn't like tags with a slash by @briskt in #385
• [IDP-1266, part 1] Track emails to non-users by @forevermatt in #384
• Release - replace Smartphone with Authenticator by @hobbitronics in #386
• [IDP-1266, part 2] Rate limit both non user emails, add EmailLog validation by @forevermatt in #387

Changelog

Fixed

• Don't push branch tags to GHCR because it doesn't like tags with a slash
• Add 'ext-group-sync-errors' and 'abandoned-users' EmailLog message types
• Fix argument within iCheckIfAGetBackupCodesEmailHasBeenSentRecently()
  • It was passing a User when it should have been passing the User ID.
• Use reflection to avoid need to maintain duplicate list of message types
• Add a test that the 'abandoned-user' email isn't sent too frequently
• Add a test that the 'ext-groups-sync-errors' email isn't sent too frequently
• Remove unneeded use import in a test file
• Ensure we don't log an email as to both a User and non-user address
• Ensure every email we log is to either a User or a non-user address

Changed (non-breaking)

• Allow email_log.user_id to be null, and add non_user_address column
• Renamed "Smartphone" to "Authenticator" (re: TOTP MFA)
• Avoid sending 'ext-groups-sync-errors' email too frequently
• Log emails sent to non-user addresses, too

Full Changelog: 6.10.4...6.10.5