fix: Set PatchType Correctly (Next) (#447)

* Do not set patch type when patch is empty.

* Correctly handle PatchType with no changes.

Author: Silvenga

src/KubeOps/Operator/Webhooks/AdmissionResponse.cs

@@ -20,7 +20,7 @@ internal sealed class AdmissionResponse
     public string[] Warnings { get; init; } = Array.Empty<string>();
 
     [JsonPropertyName("patchType")]
-    public string? PatchType { get; set; } = JsonPatch;
+    public string? PatchType { get; set; }
 
     [JsonPropertyName("patch")]
     public string? Patch { get; set; }

src/KubeOps/Operator/Webhooks/IMutationWebhook{TEntity}.cs

@@ -77,6 +77,7 @@ AdmissionResponse IAdmissionWebhook<TEntity, MutationResult>.TransformResult(Mut
 
             var patch = KubernetesJsonDiffer.DiffObjects(from, to);
             response.Patch = Convert.ToBase64String(Encoding.UTF8.GetBytes(patch.ToString()));
+            response.PatchType = AdmissionResponse.JsonPatch;
         }
 
         return response;