Support controlplane reference of KIC type

[randmonkey]

Is there an existing issue for this?

• I have searched the existing issues

Does this enhancement require public documentation?

• I have added an Acceptance Criteria item for adding and/or adjusting public documentation (if applicable)

Problem Statement

KIC should only reconcile Kong configuration CRDs with Control Plane type kic after migrated CRDs to Kong/kubernetes-configuration repo.

Proposed Solution

• For each reconciler of Kong configuration CRD, do not reconcile CP ref with type iother than kic
• Also reconcile CRD with empty (nil) CP ref to support existing CRDs before migrating to Kong/kubernetes-configuration repo

Additional information

No response

Acceptance Criteria

• Kong configuration CRDs with type of controlPlaneRef other than kic are not reconciled by KIC
• Existing CRDs before migration (without controlPlaneRef ) can still be reconciled by KIC if other condition (ingress class) satisfied