NO-JIRA: [release-4.20] Enable ReadWriteOncePod for Cinder CSI

[kchawlani19]

Analysis / Root cause:
On OpenShift 4.20, the Create PersistentVolumeClaim form greys out ReadWriteOncePod for Cinder CSI. Allowed access modes come from a static map in frontend/public/components/storage/shared.ts; cinder.csi.openstack.org listed only ReadWriteOnce. Creating the same PVC via YAML works. Reported in #16866 against 4.20 IPI on OpenStack 18.

Solution description:
Backport of #16870 plus regression tests:

• cinder.csi.openstack.org: add ReadWriteOncePod for Filesystem and Block
• kubernetes.io/cinder: remove duplicate ReadWriteOncePod entries
• unit tests for the provisioner access-mode helpers

Screenshots / screen recording:
N/A (access-mode dropdown option enablement)

Test setup:
OpenShift 4.20 on OpenStack with a StorageClass whose provisioner is cinder.csi.openstack.org.

Test cases:

1. Storage → PersistentVolumeClaims → Create PersistentVolumeClaim
2. Select a Cinder CSI StorageClass
3. Access mode options include "Read write once pod (RWOP)" alongside "Single user (RWO)"
4. Create a PVC with RWOP / Filesystem and confirm it binds
5. Repeat with volume mode Block
6. Regression: Manila CSI access modes unchanged

Browser conformance:

• Chrome
• Firefox
• Safari (or Epiphany on Linux)

Additional info:
Related to #16866
Backport of #16870
Tests on main: #17105
4.22 backport: #17106

Reviewers and assignees:
/assign spadgett

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[openshift-ci-robot]

@kchawlani19: This pull request explicitly references no jira issue.

Details

In response to this:

Analysis / Root cause:
On OpenShift 4.20, the Create PersistentVolumeClaim form greys out ReadWriteOncePod for Cinder CSI. Allowed access modes come from a static map in frontend/public/components/storage/shared.ts; cinder.csi.openstack.org listed only ReadWriteOnce. Creating the same PVC via YAML works. Reported in #16866 against 4.20 IPI on OpenStack 18.

Solution description:
Backport of #16870 plus regression tests:

• cinder.csi.openstack.org: add ReadWriteOncePod for Filesystem and Block
• kubernetes.io/cinder: remove duplicate ReadWriteOncePod entries
• unit tests for the provisioner access-mode helpers

Screenshots / screen recording:
N/A (access-mode dropdown option enablement)

Test setup:
OpenShift 4.20 on OpenStack with a StorageClass whose provisioner is cinder.csi.openstack.org.

Test cases:

1. Storage → PersistentVolumeClaims → Create PersistentVolumeClaim
2. Select a Cinder CSI StorageClass
3. Access mode options include "Read write once pod (RWOP)" alongside "Single user (RWO)"
4. Create a PVC with RWOP / Filesystem and confirm it binds
5. Repeat with volume mode Block
6. Regression: Manila CSI access modes unchanged

Browser conformance:

• Chrome
• Firefox
• Safari (or Epiphany on Linux)

Additional info:
Related to #16866
Backport of #16870
Tests on main: #17105
4.22 backport: #17106

Reviewers and assignees:
/assign spadgett

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This pull-request has been approved by: kchawlani19
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