Remove v1alpha1 visibility API

[mbobrovskyi]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Remove the v1alpha1 Visibility API.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

As we discussed here #3008 (comment) we should remove v1alpha1 visibility API on 0.10 version.

Does this PR introduce a user-facing change?

Removed the v1alpha1 Visibility API.

ACTION REQUIRED: The v1alpha1 Visibility API is deprecated. Please use v1beta1 instead.

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[trasc]

I think config/components/visibility/apiservice_v1alpha1.yaml should be removed also.
Check the documentation, there may be other references to v1alpha1 there.

[mbobrovskyi]

I think config/components/visibility/apiservice_v1alpha1.yaml should be removed also. Check the documentation, there may be other references to v1alpha1 there.

Thank you so much! I missed API changes.

[mbobrovskyi]

/cc @mimowo @PBundyra

[mimowo]

I will leave the first pass to @PBundyra

[PBundyra]

/lgtm
Thanks!

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: b57dce5b6df4a4e43c8a163b4b135c399de8500b

[mimowo]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mbobrovskyi, mimowo

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