[OCPNODE-677] Add conversin webhook for ICSP

[QiWang19]

Use conversion webhook for adding repositoryMirrors to ICSP.
The ImageContentSourcePolicy CRD needs a conversion webhook from
operator.openshift.io/v1alpha1 to operator.openshift.io/v1alpha2 for
adding new spec repositoryMirrors and deprecating repositoryDigestMirrors.

Signed-off-by: Qi Wang qiwan@redhat.com

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To complete the pull request process, please assign mandre after the PR has been reviewed.
You can assign the PR to them by writing /assign @mandre in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@QiWang19: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Rerun command
ci/prow/markdownlint	4f3edc3	link	/test markdownlint

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[QiWang19]

Close the enhancement since we decide to handle both versions of the ICSP inside the MCO and the webhook is not needed. This will avoid taking the complexity of the webhook.