fix(manila-csi-plugin): revert to setting cluster id from environment

[1602077]

What this PR does / why we need it:

https://github.com/kubernetes/cloud-provider-openstack/pull/3141/changes#diff-b7f52a172b36d41c221a2e0760bf071c34a1ed12b7eb99e34d1aedb8e5d128f1R65 reverted my change in #3152 because it was not rebased properly.

This reverts this change so that I can once again set the cluster ID argument by passing the information from a config map.

Which issue this PR fixes(if applicable):
fixes #3070

Special notes for reviewers:

Release note:

NONE

[kubernetes-prow]

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[kubernetes-prow]

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[gouthampacha]

/ok-to-test

thanks for flagging @1602077

[gouthampacha]

/lgtm

[gouthampacha]

cc @kayrus