[release-4.20] OCPBUGS-63171: Add imagestream update dryrun test

[wangke19]

Manually cherry-pick of #30357

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci-robot]

@wangke19: This pull request references Jira Issue OCPBUGS-63171, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

Manually cherry-pick of #30357

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: wangke19
Once this PR has been reviewed and has the lgtm label, please assign smg247 for approval. For more information see the Code Review Process.

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[wangke19]

/close

[openshift-ci]

@wangke19: Closed this PR.

In response to this:

/close

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[openshift-ci-robot]

@wangke19: This pull request references Jira Issue OCPBUGS-63171. The bug has been updated to no longer refer to the pull request using the external bug tracker.

In response to this:

Manually cherry-pick of #30357

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 openshift-eng/jira-lifecycle-plugin repository.