RequeueBackfillApprovalMergeRequestRulesUsersProjectId

What does this MR do and why?

RequeueBackfillApprovalMergeRequestRulesUsersProjectId

Addresses &11670

Following https://gitlab.com/gitlab-com/gl-infra/capacity-planning-trackers/gitlab-com/-/issues/2261#note_2502040005

Based on https://docs.gitlab.com/development/database/batched_background_migrations/#re-queue-batched-background-migrations

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