Migrate k8s image registry to registry.k8s.io

[karthikk92]

Description

Migrate k8s image registry to registry.k8s.io

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#743

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

[rensyct]

Please check if we need to change in the documentation section of offlineinstall
https://github.com/dell/csi-unity/blob/994753c99e18b1e788e7e7177ba547e8ab402d8c/dell-csi-helm-installer/csi-offline-bundle.md

[karthikk92]

Please check if we need to change in the documentation section of offlineinstall https://github.com/dell/csi-unity/blob/994753c99e18b1e788e7e7177ba547e8ab402d8c/dell-csi-helm-installer/csi-offline-bundle.md

Example format for dell-csi-operator mentioned. So will update accordingly once the changes pushed for dell-csi-operator.