kubeadm: Bump minimum supported versions and add etcd version for 1.2…

[niulechuan]

What type of PR is this?

/kind cleanup

It's my first PR, thanks for the opportunity!

What this PR does / why we need it:

Which issue(s) this PR fixes:

kubernetes/kubeadm#2440

Clean up 1.22 housekeeping tasks:

• Bump minimum supported versions and add etcd version for 1.22 and placeholder for 1.23

Does this PR introduce a user-facing change?

None

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

None

[k8s-ci-robot]

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[k8s-ci-robot]

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[pacoxu]

/ok-to-test
/release-note-none
/priority backlog
/triage accepted
/lgtm
/approve

[pacoxu]

/assign @fabriziopandini

[neolit123]

/lgtm
/approve
/triage accepted
/priority important-soon

thanks @niulechuan

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: neolit123, niulechuan, pacoxu

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• cmd/kubeadm/OWNERS [neolit123]

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[fejta-bot]

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