Extend email notifications for expiring tokens to 30 and 60 days

Background

In Add Notification for expiring Project Access To... (#367706 - closed), we added email notifications for tokens (project, group, personal) that expire within X days, where X is 7 and 1.

Proposal

Add more email notifications, include 30 and 60 days before expiry. Note the ExpiringWorker https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/workers/personal_access_tokens/expiring_worker.rb?ref_type=heads was recently refactored to ensure it can accomodate the increased number of notifications that needed to be sent. As we add 30 and 60 day notifications, the query should be validated to ensure it's still performant.

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