Ro pvc feature changes

[shefali-malhotra]

PR Submission checklist

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#487

Common PR Checklist:

• Have you made sure that the code compiles?
• Have you commented your code, particularly in hard-to-understand areas
• Did you run tests in a real Kubernetes cluster?
• Have you maintained backward compatibility

Description of your changes:

• Updated Go version to 1.21

• Introduced access zone in snapshot path .
  Incase of system access zone snapshot from /ifs/.snapshot directory will be refered for volume creation.
  and in case of non system access zone snapshot from /ifs/<access_zone_base_path>/.snapshot directory will be referred.
  All corresponding apis are updated.

Test performed :

1. Created RO volume in system and non system access zone and restored them. Mounted a pod on restored volume.
2. Created RW volume in system and non system access zone and restored them. Mounted a pod on restored volume.

[HarishH-DELL]

LGTM