NO-ISSUE: MCN changes for API validation

[isabella-janssen]

- What I did
Update the NotYetSet constant used throughout the upgrade monitor to match the validation enforced by the updated MCN API.

- How to verify it
Launch cluster with this and the API PR.

launch 4.19,openshift/api#2201,openshift/machine-config-operator#4949 aws,techpreview

- Description for the changelog
Upgrade monitor: Update default NotYetSet placeholder constant

[openshift-ci-robot]

@isabella-janssen: This pull request explicitly references no jira issue.

Details

In response to this:

- What I did

- How to verify it

- Description for the changelog

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.

[isabella-janssen]

/label acknowledge-critical-fixes-only

Necessary for the MCN v1alpha1 PR tests to pass.

[djoshy]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: djoshy, isabella-janssen

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

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Needs approval from an approver in each of these files:

• OWNERS [djoshy,isabella-janssen]

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[openshift-ci-robot]

/retest-required

Remaining retests: 0 against base HEAD 53e78f3 and 2 for PR HEAD 3549f56 in total

[isabella-janssen]

/retest-required

[openshift-ci]

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

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-ovn-upgrade-out-of-change	3549f56	link	false	/test e2e-aws-ovn-upgrade-out-of-change
ci/prow/okd-scos-e2e-aws-ovn	3549f56	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/e2e-azure-ovn-upgrade-out-of-change	3549f56	link	false	/test e2e-azure-ovn-upgrade-out-of-change

Full PR test history. Your PR dashboard.

Details

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-sigs/prow repository. I understand the commands that are listed here.

[openshift-bot]

[ART PR BUILD NOTIFIER]

Distgit: ose-machine-config-operator
This PR has been included in build ose-machine-config-operator-container-v4.20.0-202503260442.p0.gdadb568.assembly.stream.el9.
All builds following this will include this PR.