- Promoted the following apiserver flowcontrol metrics to Beta:

  - apiserver_flowcontrol_request_wait_duration_seconds 
  - apiserver_flowcontrol_current_executing_seats
  - apiserver_flowcontrol_nominal_limit_seats
  - apiserver_flowcontrol_rejected_requests_total
  - apiserver_flowcontrol_dispatched_requests_total
  - apiserver_flowcontrol_current_inqueue_requests

- Update kube-apiserver's priority & fairness work estimator such that 'max seats' is MIN(0.15 x nominalCL, nominalCL / handSize)
  

* GCE: Fixes ILB sync on legacy networks and auto networks with unique subnet names ([#53410](https://github.com/kubernetes/kubernetes/pull/53410), [@nicksardo](https://github.com/nicksardo))
* Fix the bug that query Kubelet's stats summary with CRI stats enabled results in error. ([#53107](https://github.com/kubernetes/kubernetes/pull/53107), [@Random-Liu](https://github.com/Random-Liu))

  - `apiserver_flowcontrol_demand_seats_high_watermark`: High watermark, over last adjustment period, of demand_seats
  - `apiserver_flowcontrol_demand_seats_average`: Time-weighted average, over last adjustment period, of demand_seats
  - `apiserver_flowcontrol_demand_seats_stdev`: Time-weighted standard deviation, over last adjustment period, of demand_seats

### Feature

- A new Priority and Fairness metric 'apiserver_flowcontrol_work_estimate_seats_samples' has been added that tracks the estimated seats associated with a request. ([#106628](https://github.com/kubernetes/kubernetes/pull/106628), [@tkashem](https://github.com/tkashem))

- Some apiserver metrics were changed, as follows.
  - `priority_level_seat_count_samples` is replaced with `priority_level_seat_utilization`, which samples every nanosecond rather than every millisecond; the old metric conveyed utilization despite its name.
  - `priority_level_seat_count_watermarks` is removed.

- Introduced new apiserver metric `apiserver_flowcontrol_current_inqueue_seats`. This metric is analogous to `apiserver_flowcontrol_current_inqueue_requests`, but tracks the total number of seats, as each request can take more than one seat. ([#119385](https://github.com/kubernetes/kubernetes/pull/119385), [@andrewsykim](https://github.com/andrewsykim))

  The scheduling hints allow the scheduler to only retry scheduling a Pod
  that was previously rejected by the NodeSchedulable plugin if a new Node or a Node update sets .spec.unschedulable to false. ([#122334](https://github.com/kubernetes/kubernetes/pull/122334), [@carlory](https://github.com/carlory)) [SIG Scheduling]
- Kube-scheduler implements scheduling hints for the PodTopologySpread plugin.