CONSOLE-4665: Disable serving of old v1alpha1 CRD version

[jhadvig]

Before removing of ConsolePlugin v1alpha1 CRD we need to set the serving of the old API version to false, based on the docs.

This is a followup of slack conversation

/assign @JoelSpeed
@spadgett FYI

[openshift-ci-robot]

@jhadvig: This pull request references CONSOLE-4665 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.20.0" version, but no target version was set.

In response to this:

Before removing of ConsolePlugin v1alpha1 CRD we need to set the serving of the old API version to false, based on the docs.

This is a followup of slack conversation

/assign @JoelSpeed
@spadgett FYI

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[openshift-ci]

Hello @jhadvig! Some important instructions when contributing to openshift/api:
API design plays an important part in the user experience of OpenShift and as such API PRs are subject to a high level of scrutiny to ensure they follow our best practices. If you haven't already done so, please review the OpenShift API Conventions and ensure that your proposed changes are compliant. Following these conventions will help expedite the api review process for your PR.

[JoelSpeed]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jhadvig, JoelSpeed

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