[cinder-csi-plugin] Use context

[stephenfin]

What this PR does / why we need it:

Use the generated VolumeContext.

Which issue this PR fixes(if applicable): fixes #2863

Special notes for reviewers:

Release note:

NONE

[stephenfin]

/cc @kayrus

...again since #2743 was your PR so I'd like to make sure I'm not missing anything obvious :sweat_smile:

[mandre]

/cc @kayrus

...again since #2743 was your PR so I'd like to make sure I'm not missing anything obvious 😅

I think you meant https://github.com/kubernetes/cloud-provider-openstack/pull/2687, where volCtx was introduced but never used.

[kayrus]

@stephenfin would you like to ship this in 1.34?

[stephenfin]

@stephenfin would you like to ship this in 1.34?

I don't think it's critical, but it would be good to include, yes. I've addressed your comment now (sorry I missed it earlier).

[k8s-ci-robot]

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