update kube-version-min-required to v1.27

[KubeKyrie]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Bump kube_version_min_required to 1.27.0 and cleanup 1.26 hashes
Which issue(s) this PR fixes:

Fixes #10812

Special notes for your reviewer:
NONE
Does this PR introduce a user-facing change?:

Remove support for Kubernetes 1.26.x (move min version to 1.27.x)

[k8s-ci-robot]

Hi @KubeKyrie. Thanks for your PR.

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[cyclinder]

/ok-to-test

[yankay]

Thanks @KubeKyrie
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: KubeKyrie, yankay

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[VannTen]

/lgtm