remove namespace usage from CSI

[boddumanohar]

this PR addresses 2 issues:

Issue 1:

The namespace parameter passed as a part of LVOL create is repurposed as a part of SFAM-2019. The new convention refers to NVMe namespace.

Issue 2:

Pass nil during GET request instead of {}

Testing

successful e2e run

Will run 5 of 8 specs
S
------------------------------
• [SLOW TEST] [85.546 seconds]
SPDKCSI-CLONE Test SPDK CSI Volume Clone Test SPDK CSI Clone
/home/runner/work/simplyBlockDeployGCP/simplyBlockDeployGCP/simplyblock-csi/e2e/clone.go:15
------------------------------
S•
------------------------------
• [SLOW TEST] [48.682 seconds]
SPDKCSI-NVMEOF Test SPDK CSI Dynamic Volume Provisioning Test the flow for Dynamic volume provisioning
/home/runner/work/simplyBlockDeployGCP/simplyBlockDeployGCP/simplyblock-csi/e2e/nvmeof.go:30
------------------------------
• [SLOW TEST] [81.847 seconds]
SPDKCSI-NVMEOF Test SPDK CSI Dynamic Volume Provisioning Test multiple PVCs
/home/runner/work/simplyBlockDeployGCP/simplyBlockDeployGCP/simplyblock-csi/e2e/nvmeof.go:52
------------------------------
S
------------------------------
• [SLOW TEST] [163.448 seconds]
SPDKCSI-SNAPSHOT Test SPDK CSI Snapshot Test SPDK CSI Snapshot
/home/runner/work/simplyBlockDeployGCP/simplyBlockDeployGCP/simplyblock-csi/e2e/snapshot.go:15
------------------------------

Ran 5 of 8 Specs in 380.248 seconds
SUCCESS! -- 5 Passed | 0 Failed | 0 Pending | 3 Skipped
--- PASS: TestE2E (380.25s)

https://github.com/simplyblock-io/simplyBlockDeployGCP/actions/runs/15400210708/job/43330881473