Test CEL rules on CRDs

[mlavacca]

Problem Statement

#1 added quite a long xvalidation on fields, and we can imagine it will easily happen again in the future. We could add a test machinery to deploy example manifests and check the CEL rules are enforced. We need not only to apply valid manifests, as we already do with our config/samples folder, but we need a full suite that triggers errors and ensures they are properly raised.

Proposed Solution

Additional Information

Acceptance Criteria

• CEL validation rules are checked with automatic tests