Backport: Fix Sidekiq workers delete each other's metrics

What does this MR do?

This backports !66432 (merged) for the 14-0-stable-ee-patch-8 patch release.

See !66432 (comment 657805016)

Per https://gitlab.com/gitlab-org/release/docs/blob/master/general/patch/process.md#process-for-developers:

  • Create a new MR against the corresponding stable branches, e.g. for a 12.10 backport you'd use 12-10-stable-ee as the target branch, and the %12.10 milestone.
  • Go through the usual code review process, and after the maintainer review assign the MR to release managers.

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Edited by Matthias Käppler