[cinder-csi-plugin] ephemeral volume removal

[sergelogvinov]

Disable creating new deprecated ephemeral volumes

What this PR does / why we need it:

Remove deprecated ephemeral volumes.

Which issue this PR fixes(if applicable): fixes #2599

Special notes for reviewers:

Hi, @dulek i've disabled only ephemeral volume creation stage. What do you think, we should remove all code or make it in two steps (releases)?

Thanks.

Release note:

In-line ephemeral is no longer available.

[k8s-ci-robot]

Hi @sergelogvinov. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[jichenjc]

/ok-to-test

[jichenjc]

thanks for the PR, could you please update

• doc needed
• release notes about this PR

[sergelogvinov]

/retest-required

[jichenjc]

@sergelogvinov from the error seems more clean up needed, maybe sainty test cases?

[sergelogvinov]

@jichenjc All tests passed. thanks.

[jichenjc]

/approve

[jichenjc]

if no objection, let's merge this soon

[sergelogvinov]

i've rebased the PR... Thanks.

[sergelogvinov]

All tests passed, can you take a look please @zetaab @mdbooth Thanks.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jichenjc, zetaab

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes/cloud-provider-openstack/blob/master/OWNERS)~~ [jichenjc,zetaab] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment