OCPNODE-2877: Update cgroups enhancement proposal to support the removal of cgroupv1

[sairameshv]

Here is the updated cgroups enhancement proposal that includes the removal of cgroup v1 from the OCP clusters starting from 4.19.

Following is the summary of the updated enhancement proposal

• Add a CEL validation to deny the setting of cgroupMode to v1
• Block the upgrades if the cluster is on cgroups v1
• Add an upgrade edge i.e. minimum 4.18 version to support seamless
  upgrade from 4.18 to 4.19

/cc @rphillips @mrunalp @deads2k @yuqi-zhang

[openshift-ci-robot]

@sairameshv: This pull request references OCPNODE-2877 which is a valid jira issue.

In response to this:

Here is the updated cgroups enhancement proposal that includes the removal of cgroup v1 from the OCP clusters starting from 4.19.

/cc @rphillips @mrunalp @deads2k @yuqi-zhang

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[sairameshv]

/cc @haircommander

[sairameshv]

/retest

[yuqi-zhang]

Overall makes sense, some questions inline

[sairameshv]

@rphillips @haircommander Could you take a re-look at the updated changes?

[haircommander]

/lgtm

thanks!

[openshift-ci-robot]

@sairameshv: This pull request references OCPNODE-2877 which is a valid jira issue.

In response to this:

Here is the updated cgroups enhancement proposal that includes the removal of cgroup v1 from the OCP clusters starting from 4.19.

Following is the summary of the updated enhancement proposal

• Add a CEL validation to deny the setting of cgroupMode to v1
• Block the upgrades if the cluster is on cgroups v1
• Add an upgrade edge i.e. minimum 4.18 version to support seamless
  upgrade from 4.18 to 4.19

/cc @rphillips @mrunalp @deads2k @yuqi-zhang

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mrunalp

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[haircommander]

/lgtm

[openshift-ci]

@sairameshv: all tests passed!

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