Clean up per-worker Sidekiq recording rules
Clean up the gitlab_background_jobs:execution:* recording rules and gitlab_background_jobs:queue:apdex* rules. References to these rules are replaced with the sidekiq_execution and sidekiq_queueing application SLIs.
The remaining gitlab_background_jobs:queue:ops:* are still around as it denotes enqueueing RPS.
Edited by Marco Gregorius