Improve performance during block volume re-encryption

[nikolay-andreev]

What this PR does / why we need it:
Volume re-encryption requires the current encryption status of the First-Class Disk (FCD) to apply the desired crypto spec. The encryption status is currently retrieved using the CNS API QueryVolumeInfo. This API returns much more information than necessary, resulting in a 4x performance penalty compared to retrieving the storage object directly.

Testing done:
API performance tests:

Iterations: 100
CnsQueryVolume: 27.15s
CnsQueryVolumeInfo: 109.26s
VslmRetrieveVStorageObject: 26.75s

Iterations: 1000
CnsQueryVolume: 274.38s
CnsQueryVolumeInfo: 1158.22s
VslmRetrieveVStorageObject: 259.36s

Special notes for your reviewer:

Release note:

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: nikolay-andreev / name: Nikolay Andreev (bfa8f01)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @nikolay-andreev. Thanks for your PR.

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[SandeepPissay]

CSI should not invoke internal FCD API as FCD is an internal implementation detail of CNS. This also does not align with how we are building out the CNS stack and APIs . We should not merge this PR, so I'm putting a hold on this.

/hold