Avoid dependency on Operator SDK in CLO (remove operator sdk from go.mod)

Motivation

In SDK v1.0 several packages removed or moved to the other protect (operator-lib title).

Removed packages:

• pkg/k8sutil
• pkg/kube-metrics
• pkg/metrics
• pkg/ready
• pkg/tls

Need to rewrite/remove code that depend on these packages.

Acceptance criteria

• go.mod file has no dependency on Operator SDK
• all test passed