Revert "add metrics tagging to the sidekiq middleware"

What does this MR do?

Fix #39958 (closed) by reverting !15111 (merged)

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

A change was done in the metrics backend and a method was removed because it is dangerous. This method was used in the implementation of !15111 (merged)

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered

What are the relevant issue numbers?

Revert !15111 (merged) Closes #39958 (closed)

/cc @pchojnacki @smcgivern