[release-4.20] Bug OCPBUGS-82295: Fix vMedia insertion on Cisco C845A M8 and similar OpenBMC systems

[jacob-anders]

Some virtual media slots on Cisco C845A M8 (and potentially other OpenBMC-based systems) only support local/KVM access via WebSocket/NBD and do not expose the InsertMedia Redfish action. Attempting to use these slots results in HTTP 405 (Method Not Allowed).

This patch adds a pre-check to skip slots without the InsertMedia action, and catches HTTP 405 errors as a fallback to try the next available slot.

Change-Id: I6242c62f691bf642708c9ab147522cee88edd3a7

Assisted-By: Claude Code Opus 4.6
(cherry picked from commit 8c95a7b) (cherry picked from commit 3be7de98b1196ca0837f3ceca25c3ee60f5bfb94) (cherry picked from commit bf4ff2e)

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci-robot]

@jacob-anders: This pull request references Jira Issue OCPBUGS-82295, 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.
• expected dependent Jira Issue OCPBUGS-82294 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is POST instead

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.

Details

In response to this:

Some virtual media slots on Cisco C845A M8 (and potentially other OpenBMC-based systems) only support local/KVM access via WebSocket/NBD and do not expose the InsertMedia Redfish action. Attempting to use these slots results in HTTP 405 (Method Not Allowed).

This patch adds a pre-check to skip slots without the InsertMedia action, and catches HTTP 405 errors as a fallback to try the next available slot.

Change-Id: I6242c62f691bf642708c9ab147522cee88edd3a7

Assisted-By: Claude Code Opus 4.6
(cherry picked from commit 8c95a7b) (cherry picked from commit 3be7de98b1196ca0837f3ceca25c3ee60f5bfb94) (cherry picked from commit bf4ff2e)

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[MahnoorAsghar]

/lgtm

[MahnoorAsghar]

#395 might help with the unit job

[MahnoorAsghar]

/test unit

[openshift-ci]

@jacob-anders: all tests passed!

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