fix: enable empty and len rules from testifylint on pkg package

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

Co-authored-by: Patrick Ohly <patrick.ohly@intel.com>

pkg/kubelet/kubelet_node_status_test.go

@@ -1283,7 +1283,7 @@ func TestFastStatusUpdateOnce(t *testing.T) {
 
 			actions := kubeClient.Actions()
 			if tc.wantPatches == 0 {
-				require.Len(t, actions, 0)
+				require.Empty(t, actions)
 				return
 			}