Implement more advanced CEL validation for some fields in CRDs

[programmer04]

Problem Statement

PR

• chore(ci): migrate lint.api from kubernetes-configuration and fix reported issues #2382

reintroduced CRD linitng and fixed some obvious issues. Less obvious was handled in the separate 8d2f5ea commit in the PR #2382. It was just adding

// +kubebuilder:validation:MinLength=1

to satisfy the linter.

Proposed Solution

Implement proper validation for those fields that have a rationale and won't pass for basically everything

Acceptance Criteria

• validation for fields mentioned above is revisited and enhanced