test(operator): exclude PlacementStatus from cross-field fuzz filler

Register no-op custom fuzzers for the v1alpha1 and v1beta1
PlacementStatus so the round-trip fuzz filler does not draw random
bits for Placement.

Rationale:
- Placement round-trip is already covered explicitly by
  TestDGD_RoundTrip_Status (Score=ptr.To(0.87), State=Reported).
- Not consuming RNG bits for Placement keeps the fuzz stream stable
  as DGDStatus grows, so field additions do not shift the stream
  onto payloads that surface unrelated latent bugs in downstream
  conversion paths.
- Follows the existing dynamoFuzzerFuncs pattern for constraining
  fuzzer input to admissible shapes.

Signed-off-by: ashnamehrotra <ashnamehrotra@gmail.com>

Author: ashnamehrotra

deploy/operator/api/roundtrip_fuzz_test.go

@@ -216,6 +216,14 @@ func dynamoFuzzerFuncs(_ runtimeserializer.CodecFactory) []any {
 		fuzzAlphaDGDRStatus,
 		fuzzBetaDGDRSpec,
 		fuzzBetaDGDRStatus,
+		// PlacementStatus (v1alpha1 + v1beta1): keep the fuzz filler from
+		// drawing random bits for this pointer field. Placement conversion
+		// is exercised by TestDGD_RoundTrip_Status; excluding it here keeps
+		// the fuzz RNG stream stable across schema growth on DGDStatus so
+		// that field additions do not surface unrelated latent bugs in
+		// downstream conversion paths.
+		func(p *v1beta1.PlacementStatus, _ randfill.Continue) {},
+		func(p *v1alpha1.PlacementStatus, _ randfill.Continue) {},
 		// v1beta1 Components: the listMapKey marker requires name
 		// to be non-empty and unique; MaxItems caps the length at 25.
 		// Enforce both so the input is admissible.