Mark v1beta1 NetworkPolicy types as deprecated

[cmluciano]

What this PR does / why we need it:
Deprecates v1beta1 NetworkPolicy in favor of v1. The default storage is now set to v1 in 1.9.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Related #56423

Special notes for your reviewer:

Release note:

deprecate NetworkPolicy v1beta1 API in extensions

[caseydavenport]

/test pull-kubernetes-unit

[caseydavenport]

@cmluciano I think we need to get this added to v1.9?

[caseydavenport]

/lgtm

[caseydavenport]

/assign @thockin

[thockin]

/approve

@enisoc This is a non-code change - process needed?

[k8s-github-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: caseydavenport, cmluciano, thockin

Associated issue: 56423

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Needs approval from an approver in each of these OWNERS Files:

• api/OWNERS [thockin]
• docs/api-reference/OWNERS [thockin]
• staging/src/k8s.io/api/OWNERS [thockin]

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[enisoc]

@thockin Docs change is ok. Adding milestone.

[k8s-github-robot]

[MILESTONENOTIFIER] Milestone Pull Request Current

@caseydavenport @cmluciano @dnardo @lukaszo @thockin

Note: This pull request is marked as priority/critical-urgent, and must be updated every 1 day during code freeze.

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ACK.  In progress
ETA: DD/MM/YYYY
Risks: Complicated fix required

Pull Request Labels

• sig/network: Pull Request will be escalated to these SIGs if needed.
• priority/critical-urgent: Never automatically move pull request out of a release milestone; continually escalate to contributor and SIG through all available channels.
• kind/cleanup: Adding tests, refactoring, fixing old bugs.

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[k8s-github-robot]

Automatic merge from submit-queue (batch tested with PRs 56497, 56500, 55018, 56544, 56425). If you want to cherry-pick this change to another branch, please follow the instructions here.