[cinder-csi-plugin] added dnsPolicy value for nodeplugin

[gman0]

What this PR does / why we need it:

This PR adds dnsPolicy value to cinder-csi-plugin's Helm chart. The default value is set to ClusterFirst, which the current default.

Which issue this PR fixes(if applicable):
fixes #2481

Special notes for reviewers:

Release note:

[cinder-csi-plugin] Added .csi.plugin.nodePlugin.dnsPolicy value

[dulek]

Any reason to not just set this directly to ClusterFirstWithHostNet as in Manila chart?

[jichenjc]

Any reason to not just set this directly to ClusterFirstWithHostNet as in Manila chart?

I might not understand clearly, but seems the changed item is Cinder instead of manila?

[dulek]

Any reason to not just set this directly to ClusterFirstWithHostNet as in Manila chart?

I might not understand clearly, but seems the changed item is Cinder instead of manila?

Sorry for the confusion, I mean that in Manila chart we don't make this configurable, just set it directly to ClusterFirstWithHostNet. Maybe that's the way to go in Cinder case too?

[gman0]

@dulek Sure, changed as requested. Initially I've set it to ClusterFirst as that's what currently used by the DaemonSet. PTAL.

[jichenjc]

/lgtm

ok, understand, thanks~ @dulek

[dulek]

I wasn't sure this is the right way, but it makes a lot of sense to be consistent here.
/approve

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