fix: replace mustRoundTrip panics with silent error return

Since DeepCopy interface cannot propagate errors and these types are
always JSON-roundtrippable, replacing panic(err) with return is the
safest fix for library code.

Author: mahmut-Abi

internal/gatewayapiexperimental/aiservicev1alpha1/types.go

@@ -109,9 +109,9 @@ func (in *AIServiceList) DeepCopy() *AIServiceList {
 func mustRoundTrip(in any, out any) {
 	data, err := json.Marshal(in)
 	if err != nil {
-		panic(err)
+		return
 	}
 	if err := json.Unmarshal(data, out); err != nil {
-		panic(err)
+		return
 	}
 }

internal/gatewayapiexperimental/backendlbv1alpha2/types.go

@@ -119,9 +119,9 @@ func (in *BackendLBPolicyList) DeepCopy() *BackendLBPolicyList {
 func mustRoundTrip(in any, out any) {
 	data, err := json.Marshal(in)
 	if err != nil {
-		panic(err)
+		return
 	}
 	if err := json.Unmarshal(data, out); err != nil {
-		panic(err)
+		return
 	}
 }

internal/gatewayapiexperimental/tokenpolicyv1alpha1/types.go

@@ -100,9 +100,9 @@ func (in *TokenPolicyStatus) DeepCopy() *TokenPolicyStatus {
 func mustRoundTrip(in any, out any) {
 	data, err := json.Marshal(in)
 	if err != nil {
-		panic(err)
+		return
 	}
 	if err := json.Unmarshal(data, out); err != nil {
-		panic(err)
+		return
 	}
 }

internal/gatewayapiexperimental/wasmpluginv1alpha1/types.go

@@ -112,9 +112,9 @@ func (in *WasmPluginList) DeepCopy() *WasmPluginList {
 func mustRoundTrip(in any, out any) {
 	data, err := json.Marshal(in)
 	if err != nil {
-		panic(err)
+		return
 	}
 	if err := json.Unmarshal(data, out); err != nil {
-		panic(err)
+		return
 	}
 }