Fixes https://emqx.atlassian.net/browse/EMQX-12052

Release version: v/e5.6.0

Summary

• add authentication_faulre throttled log
• add 'username' to log metadata, meaning if username is provided, most of the logs will have it included
• add 'tag' to authz warning logs

log examples:

2024-03-20T11:03:45.693577+01:00 [warning] msg: log_events_throttled_during_last_period, period: 1 minutes, 0 seconds, dropped: #{authentication_failure => 12}
2024-03-20T11:04:11.138524+01:00 [warning] tag: AUTHN, clientid: bbb, msg: authentication_failure, peername: 127.0.0.1:41538, username: a, reason: bad_username_or_password
2024-03-20T11:08:39.568980+01:00 [warning] tag: AUTHZ, clientid: bbb, msg: cannot_publish_to_topic_due_to_not_authorized, peername: 127.0.0.1:47860, username: aaa, topic: republish-event/1, reason: not_authorized
2024-03-20T12:04:45.519265+01:00 [warning] tag: AUTHZ, clientid: bbb, msg: authorization_permission_denied, peername: 127.0.0.1:32798, username: aaa, topic: republish-event/1, source: file, action: SUBSCRIBE(Q0)

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• Added tests for the changes
• Added property-based tests for code which performs user input validation
• Changed lines covered in coverage report
• Change log has been added to changes/(ce|ee)/(feat|perf|fix|breaking)-<PR-id>.en.md files
• For internal contributor: there is a jira ticket to track this change
• Created PR to emqx-docs if documentation update is required, or link to a follow-up jira ticket
• Schema changes are backward compatible

Checklist for CI (.github/workflows) changes

• If changed package build workflow, pass this action (manual trigger)
• Change log has been added to changes/ dir for user-facing artifacts update