Detect and ignore HelmRelease status update

As the update function receives any update, and we do not want to run
expensive dry-runs for status updates, but do want them for resyncs.

Theoretically this should not result in resyncs being skipped, as a
resync will redeliver a resource that was already known, which
should equal to oldFhr.Status == newFhr.Status.

integrations/helm/operator/operator.go

@@ -282,8 +282,17 @@ func (c *Controller) enqueueUpdateJob(old, new interface{}) {
 		return
 	}
 
-	log := []string{"info", "enqueuing release upgrade"}
-	if diff := cmp.Diff(oldFhr.Spec, newFhr.Spec); diff != "" && c.logDiffs {
+	diff := cmp.Diff(oldFhr.Spec, newFhr.Spec)
+
+	// If the spec did not change, but the status did, we are not
+	// interested in doing an expensive dry-run to detect changes,
+	// as there probably are none.
+	if sDiff := cmp.Diff(oldFhr.Status, newFhr.Status); diff == "" && sDiff != "" {
+		return
+	}
+
+	log := []string{"info", "enqueuing release"}
+	if diff != "" && c.logDiffs {
 		log = append(log, "diff", diff)
 	}
 	log = append(log, "resource", newFhr.ResourceID().String())