Patch the correct observed state after a rm.ReadOne call

`resourceManager.ReadOne` is not returning the correct observed state
when `sdkFind` returns with an error. Which is causing the reconciler
to patch to wrong state (`desird` instead `observed`). This patch fixes
this issue by passing the correct observed state to `onError`.

templates/pkg/resource/manager.go.tpl

@@ -74,7 +74,7 @@ func (rm *resourceManager) ReadOne(
 	}
 	observed, err := rm.sdkFind(ctx, r)
 	if err != nil {
-		return rm.onError(r, err)
+		return rm.onError(observed, err)
 	}
 	return rm.onSuccess(observed)
 }