[WIP] Change clone strategy to avoid PowerStore snapshot limits

[coulof]

What this PR does / why we need it:
PowerStore has a limit of 32 to 64 writable snapshots which prevents to create more VMs from a base OS.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Release note:

* Dell PowerStore uses `cloneStrategy: copy` over `csi-clone` to avoid array snapshot limits

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[akalenyu]

So CSI/snapshot clones normally create ephemeral snapshots, which should keep us within limits.
Could you please attach some PowerStore source? I am probably misunderstanding the issue.

I want to ensure I poke at this a bit, since doing host assisted clones all over is going to be a major hit for anyone who uses this solution.