helm chart update for nfs support

[khareRajshree]

Description

This PR include changes in helm chart for NFS support.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#763

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 90% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• Backward compatibility is not broken

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• Installed csi-powerflex driver with 4.0 array with nfsAcls and externalAccess configured in the config.yaml/values.yaml.

     driver:
		Container ID:  containerd://d3d8eea57596fd4a9f7df573f061365ffae688cd8a6824b6de3cb7322a1c53d3
		Image:         amaas-eos-mw1.cec.lab.emc.com:5036/csi-vxflexos:vhelm-update
		Image ID:      amaas-eos-mw1.cec.lab.emc.com:5036/csi-vxflexos@sha256:7e506bf582b2d4f17e94734034edb458e5fe5fff7ec6d5de4bd83f95007f9209
		Port:          <none>
		Host Port:     <none>
		Command:
		  /csi-vxflexos.sh
		Args:
		  --leader-election
		  --array-config=/vxflexos-config/config
		  --driver-config-params=/vxflexos-config-params/driver-config-params.yaml
		State:          Running
		  Started:      Mon, 17 Apr 2023 15:56:28 -0400
		Ready:          True
		Restart Count:  0
		Environment:
		  CSI_ENDPOINT:                             /var/run/csi/csi.sock
		  X_CSI_MODE:                               controller
		  X_CSI_VXFLEXOS_ENABLESNAPSHOTCGDELETE:    false
		  X_CSI_VXFLEXOS_ENABLELISTVOLUMESNAPSHOT:  false
		  SSL_CERT_DIR:                             /certs
		  X_CSI_NFS_ACLS:                           0777
		  X_CSI_POWERFLEX_EXTERNAL_ACCESS:          10.247.96.84