Add client autoscaler grafana panels (cadence-workflow#7177)

* Add 4 new Cadence-Client, Concurrency panels

* Add a target for an extra endpoint like the one used in autoscaling and monitoring go sample

* Added comment for samples scrape endpoint

* Add skip for flaky test: TestAssignShardsToEmptyExecutors

---------

Co-authored-by: “Kevin” <“[email protected]”>

Author: 2 people