- Adds two new metrics to cronjobs, a histogram to track the time difference when a job is created and the expected time when it should be created, as well as a gauge for the missed schedules of a cronjob ([#99341](https://github.com/kubernetes/kubernetes/pull/99341), [@alaypatel07](https://github.com/alaypatel07))

- Client-go now exposes two new metrics to monitor the client-go logic that
  generate http.Transports for the clients.
  
  - `rest_client_transport_cache_entries` is a gauge metric
  with the number of existing entries in the internal cache
  
  - `rest_client_transport_create_calls_total` is a counter
  that increments each time a new transport is created, storing

- Added `apiserver_longrunning_requests` metric to replace the soon to be deprecated `apiserver_longrunning_gauge` metric. ([#103799](https://github.com/kubernetes/kubernetes/pull/103799), [@jyz0309](https://github.com/jyz0309))
- Controller-manager: the following flags have no effect and would be removed in v1.24:
  - `--port`

- `apiserver_longrunning_gauge` was removed from the codebase. Please use `apiserver_longrunning_requests`
  instead.
   ([#110310](https://github.com/kubernetes/kubernetes/pull/110310), [@logicalhan](https://github.com/logicalhan))

### Bug or Regression