[CONTP-695] add csi driver documentation

[adel121]

What does this PR do? What is the motivation?

Add documentation for CSI driver

Merge instructions

NOT READY FOR MERGE

Merge readiness:

• [ ] Ready for merge

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To have your PR automatically merged after it receives the required reviews, add the following PR comment:

/merge

Additional notes

This PR will remain in draft mode until the final version of the documentation is ready.