[WIP] STOR-2465: Add ExternalSnapshotMetadata CRD

[dobsonj]

https://issues.redhat.com/browse/STOR-2465
Depends on openshift/api#2381

/cc @openshift/storage

[openshift-ci-robot]

@dobsonj: This pull request references STOR-2465 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 sub-task to target the "4.20.0" version, but no target version was set.

In response to this:

https://issues.redhat.com/browse/STOR-2465

/cc @openshift/storage

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[openshift-ci]

@dobsonj: GitHub didn't allow me to request PR reviews from the following users: openshift/storage.

Note that only openshift members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

https://issues.redhat.com/browse/STOR-2465

/cc @openshift/storage

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[openshift-ci-robot]

@dobsonj: This pull request references STOR-2465 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 sub-task to target the "4.20.0" version, but no target version was set.

In response to this:

https://issues.redhat.com/browse/STOR-2465
Depends on openshift/api#2381

/cc @openshift/storage

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.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dobsonj

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[openshift-ci]

@dobsonj: 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-vsphere	b15099b	link	true	/test e2e-vsphere
ci/prow/e2e-aws	b15099b	link	true	/test e2e-aws
ci/prow/okd-scos-e2e-aws-ovn	b15099b	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/e2e-vsphere-csi	b15099b	link	true	/test e2e-vsphere-csi
ci/prow/e2e-gcp-csi	b15099b	link	true	/test e2e-gcp-csi
ci/prow/e2e-hypershift-conformance	b15099b	link	false	/test e2e-hypershift-conformance
ci/prow/e2e-upgrade	b15099b	link	true	/test e2e-upgrade

Full PR test history. Your PR dashboard.

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[dobsonj]

simple manual test with cluster-bot launch 4.20.0-0.ci,openshift/api#2381,openshift/cluster-csi-snapshot-controller-operator#239 azure:

$ oc get crd | grep -i snapshotmetadataservice
$ oc edit featuregate cluster
featuregate.config.openshift.io/cluster edited
$ oc get featuregate cluster -o json | jq .spec
{
  "featureSet": "DevPreviewNoUpgrade"
}
$ oc get crd | grep -i snapshotmetadataservice
snapshotmetadataservices.cbt.storage.k8s.io                       2025-06-24T17:55:55Z