KEP-2485: Scheduler changes for beta graduation criteria

[chrishenzie]

• One-line PR description: Scheduler changes for beta graduation criteria, remove kube-controller-manager from feature gate consumers
• Issue link: ReadWriteOncePod PersistentVolume Access Mode #2485
• Other comments: Included is a small change to remove the kube-controller-manager from the feature gate consumer list, it is not required for adding the feature

/assign @alculquicondor
/assign @ahg-g

[alculquicondor]

/lgtm
from scheduling

[chrishenzie]

/assign @jsafrane
for approval

[xing-yang]

/lgtm

[jsafrane]

/approve
the storage part

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrishenzie, jsafrane

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