Merge pull request #51180 from ConnorDoyle/cpu-manager-static-policy

Automatic merge from submit-queue (batch tested with PRs 51180, 51893)

CPU manager static policy

Blocker for CPU manager #49186 (5 of 6)

* Previous PR in this series: #51357
* Next PR in this series: #51041

cc @derekwaynecarr @sjenning @flyingcougar @balajismaniam 

Attempting to be fairly accurate with main authorship at least at a file level -- please let me know if anyone has a better idea on how to improve this.

For posterity, here are the Kubelet flags to run the static policy (assuming `/kube-reserved` is a cgroup that exists for all required controllers)

`--feature-gates=CPUManager=true --cpu-manager-policy=static --cpu-manager-reconcile-period=5s --enforce-node-allocatable=pods,kube-reserved --kube-reserved-cgroup=/kube-reserved --kube-reserved=cpu=500m`

**Release note**:

```release-note
NONE
```

pkg/features/kube_features.go

@@ -151,6 +151,12 @@ const (
 	//
 	// Enable mount propagation of volumes.
 	MountPropagation utilfeature.Feature = "MountPropagation"
+
+	// owner: @ConnorDoyle
+	// alpha: v1.8
+	//
+	// Alternative container-level CPU affinity policies.
+	CPUManager utilfeature.Feature = "CPUManager"
 )
 
 func init() {
@@ -180,6 +186,7 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	TaintNodesByCondition:                       {Default: false, PreRelease: utilfeature.Alpha},
 	MountPropagation:                            {Default: false, PreRelease: utilfeature.Alpha},
 	ExpandPersistentVolumes:                     {Default: false, PreRelease: utilfeature.Alpha},
+	CPUManager:                                  {Default: false, PreRelease: utilfeature.Alpha},
 
 	// inherited features from generic apiserver, relisted here to get a conflict if it is changed
 	// unintentionally on either side: