removal of deprecated registrykey dependencies

[badri-pathak]

Pull request checklist

This is going to handle the issue CSI - Remove the deprecated ibm-spectrum-scale-registrykey from CSI

Pull request type

Please check the type of change your PR introduces: - [ ] Bugfix - [x] Feature Enhancement - [ ] Test Automation - [ ] Code Refactoring (no functional changes, no api changes) - [ ] Build related changes - [ ] Community Operator listing - [ ] Other (please describe): ## What is the current behavior?

• Currently both the secret keys are being used based the registry key configuration.

What is the new behavior?

• Going forward only the "ibm-entitlement-key" secret is the unified default key for image registry authentication.

How risky is this change?

• [ ] Small, isolated change
• [x] Medium, requires regression testing
• [ ] Large, requires functional and regression testing

[badri-pathak]

Operator Image: quay.io/badri_pathak/ibm-spectrum-scale-csi-operator:deprecatedRegistryKey_v3