Scale testing

[sbueringer]

This issue provides an overview over ongoing and upcoming tasks around scale testing.

Scale:

• ✨ Enable PriorityQueue per default #13171
• /convert gets called a lot for unserved versions (even though we never use old apiVersions)
  • Fixed via Skip creating storages for non-stored and non-served versions kubernetes/kubernetes#130704
• 🌱 Stop using patch helper when enforcing finalizers #13365
• 🌱 Improve patch helper for no-op cases #13364

Scale testing:

• 🌱 Enable native histograms in Grafana / Prometheus #13304
• 🌱 Inmemory APIserver fails for unsupported fieldSelectors #13306
• ✨ Improve scale test setup: add infra CRDs to dashboards, improve/fix dashboards, enable native histograms #13354
• 🐛 Fix goroutine & memory leak in inmemory provider #13361