noise_model_test.cc: fix -Wc++20-extensions warning

Add an empty fourth argument to INSTANTIATE_TYPED_TEST_SUITE_P().

Fixes:
  aom/test/noise_model_test.cc:536:49: warning: passing no argument for
  the '...' parameter of a variadic macro is a C++20 extension

Change-Id: Id1457ad67a101502f6b811eacfaf483dacd27848
(cherry picked from commit b736e96c15b3efe643a82d394b20c6d44fd225b6)

test/noise_model_test.cc

diff --git a/test/noise_model_test.cc b/test/noise_model_test.cc
index b3edcc2..87f607c 100644
--- a/test/noise_model_test.cc
+++ b/test/noise_model_test.cc
@@ -532,8 +532,10 @@
                          BitDepthParams<uint16_t, 10, true>,  // highbd data
                          BitDepthParams<uint16_t, 12, true> >
     AllBitDepthParams;
+// Note the empty final argument can be removed if C++20 is made the minimum
+// requirement.
 INSTANTIATE_TYPED_TEST_SUITE_P(FlatBlockInstatiation, FlatBlockEstimatorTest,
-                               AllBitDepthParams);
+                               AllBitDepthParams, );
 
 template <typename T>
 class NoiseModelUpdateTest : public ::testing::Test, public T {
@@ -968,8 +970,10 @@
                             NoiseStrengthChangeSignalsDifferentNoiseType,
                             NoiseCoeffsSignalsDifferentNoiseType);
 
+// Note the empty final argument can be removed if C++20 is made the minimum
+// requirement.
 INSTANTIATE_TYPED_TEST_SUITE_P(NoiseModelUpdateTestInstatiation,
-                               NoiseModelUpdateTest, AllBitDepthParams);
+                               NoiseModelUpdateTest, AllBitDepthParams, );
 
 TEST(NoiseModelGetGrainParameters, TestLagSize) {
   aom_film_grain_t film_grain;
@@ -1368,5 +1372,7 @@
 REGISTER_TYPED_TEST_SUITE_P(WienerDenoiseTest, InvalidBlockSize,
                             InvalidChromaSubsampling, GradientTest);
 
+// Note the empty final argument can be removed if C++20 is made the minimum
+// requirement.
 INSTANTIATE_TYPED_TEST_SUITE_P(WienerDenoiseTestInstatiation, WienerDenoiseTest,
-                               AllBitDepthParams);
+                               AllBitDepthParams, );