feat: Parse out V1Status for code 422 on Reconcile loop of ManagedController (#552)

Give a little better message for errors returned by k8s (at least for
code 422).

K8S api will return a V1Status when the API rejects a call. This can be
output to the users in the log

Author: Eddie

src/KubeOps/Operator/Controller/ManagedResourceController{TEntity}.cs

@@ -1,7 +1,9 @@
-using System.Reactive;
+using System.Net;
+using System.Reactive;
 using System.Reactive.Concurrency;
 using System.Reactive.Linq;
 using k8s;
+using k8s.Autorest;
 using k8s.Models;
 using KubeOps.Operator.Controller.Results;
 using KubeOps.Operator.DevOps;
@@ -128,6 +130,13 @@ protected async Task HandleResourceEvent(ResourceEvent<TEntity> resourceEvent)
                         return;
                 }
             }
+            catch (HttpOperationException hoe) when (hoe.Response.StatusCode == HttpStatusCode.UnprocessableEntity)
+            {
+                var status = KubernetesJson.Deserialize<V1Status>(hoe.Response.Content);
+                _logger.LogWarning(status.Message);
+                RequeueError(resourceEvent, hoe);
+                return;
+            }
             catch (Exception e)
             {
                 RequeueError(resourceEvent, e);