Remove gtest_discover_tests() from CMakeLists.txt (#1629)

It doesn't seem necessary, makes tests appear twice, with one version
sometimes failing supposedly with a double free().

Rename some fuzztest test cases for clarity/consistency.

tests/CMakeLists.txt

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e85eb68..48628e3 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -174,7 +174,6 @@
         target_include_directories(${TEST_NAME} PRIVATE ${GTEST_INCLUDE_DIRS})
         target_link_libraries(${TEST_NAME} PRIVATE aviftest_helpers ${ARGN})
         link_fuzztest(${TEST_NAME})
-        gtest_discover_tests(${TEST_NAME})
         add_test(NAME ${TEST_NAME} COMMAND ${TEST_NAME})
         set_property(TEST ${TEST_NAME} PROPERTY ENVIRONMENT "TEST_DATA_DIR=${CMAKE_CURRENT_SOURCE_DIR}/data/")
     endmacro()

tests/gtest/avif_fuzztest_dec_incr.cc

diff --git a/tests/gtest/avif_fuzztest_dec_incr.cc b/tests/gtest/avif_fuzztest_dec_incr.cc
index 5fc2cf3..b349448 100644
--- a/tests/gtest/avif_fuzztest_dec_incr.cc
+++ b/tests/gtest/avif_fuzztest_dec_incr.cc
@@ -86,7 +86,7 @@
   }
 }
 
-FUZZ_TEST(DecodeAvifTest, DecodeIncr)
+FUZZ_TEST(DecodeAvifFuzzTest, DecodeIncr)
     .WithDomains(Arbitrary<std::vector<uint8_t>>(), Arbitrary<bool>(),
                  Arbitrary<bool>(), Arbitrary<bool>())
     .WithSeeds({{GetWhiteSinglePixelAvif(), false, false, false}});

tests/gtest/avif_fuzztest_enc_dec.cc

diff --git a/tests/gtest/avif_fuzztest_enc_dec.cc b/tests/gtest/avif_fuzztest_enc_dec.cc
index 8ed281c..b319aee 100644
--- a/tests/gtest/avif_fuzztest_enc_dec.cc
+++ b/tests/gtest/avif_fuzztest_enc_dec.cc
@@ -49,7 +49,7 @@
   // hard to verify so do not check it.
 }
 
-FUZZ_TEST(EncodeDecodeAvifTest, EncodeDecodeValid)
+FUZZ_TEST(EncodeDecodeAvifFuzzTest, EncodeDecodeValid)
     .WithDomains(ArbitraryAvifImage(), ArbitraryAvifEncoder(),
                  ArbitraryAvifDecoder({AVIF_CODEC_CHOICE_AUTO,
                                        AVIF_CODEC_CHOICE_DAV1D}));

tests/gtest/avif_fuzztest_enc_dec_experimental.cc

diff --git a/tests/gtest/avif_fuzztest_enc_dec_experimental.cc b/tests/gtest/avif_fuzztest_enc_dec_experimental.cc
index 404599d..1973d50 100644
--- a/tests/gtest/avif_fuzztest_enc_dec_experimental.cc
+++ b/tests/gtest/avif_fuzztest_enc_dec_experimental.cc
@@ -115,7 +115,7 @@
       fuzztest::Arbitrary<std::array<uint8_t, sizeof(avifGainMapMetadata)>>());
 }
 
-FUZZ_TEST(EncodeDecodeAvifTest8b, EncodeDecodeValid)
+FUZZ_TEST(EncodeDecodeAvifFuzzTest, EncodeDecodeValid)
     .WithDomains(fuzztest::OneOf(ArbitraryAvifImage(),
                                  ArbitraryAvifImageWithGainMap()),
                  ArbitraryAvifEncoder(),

tests/gtest/avif_fuzztest_enc_dec_incr.cc

diff --git a/tests/gtest/avif_fuzztest_enc_dec_incr.cc b/tests/gtest/avif_fuzztest_enc_dec_incr.cc
index 1b30e0b..928026d 100644
--- a/tests/gtest/avif_fuzztest_enc_dec_incr.cc
+++ b/tests/gtest/avif_fuzztest_enc_dec_incr.cc
@@ -67,7 +67,7 @@
                                          /*useNthImageApi=*/true, cell_height);
 }
 
-FUZZ_TEST(EncodeDecodeAvifTest, EncodeDecodeGridValid)
+FUZZ_TEST(EncodeDecodeAvifFuzzTest, EncodeDecodeGridValid)
     .WithDomains(ArbitraryAvifImage(), ArbitraryAvifEncoder(),
                  ArbitraryAvifDecoder({AVIF_CODEC_CHOICE_AUTO}),
                  /*grid_cols=*/InRange<uint32_t>(1, 32),

tests/gtest/avif_fuzztest_enc_dec_incr_experimental.cc

diff --git a/tests/gtest/avif_fuzztest_enc_dec_incr_experimental.cc b/tests/gtest/avif_fuzztest_enc_dec_incr_experimental.cc
index 35aa091..da81729 100644
--- a/tests/gtest/avif_fuzztest_enc_dec_incr_experimental.cc
+++ b/tests/gtest/avif_fuzztest_enc_dec_incr_experimental.cc
@@ -111,7 +111,7 @@
       fuzztest::Arbitrary<std::array<uint8_t, sizeof(avifGainMapMetadata)>>());
 }
 
-FUZZ_TEST(EncodeDecodeAvifTest, EncodeDecodeGridValid)
+FUZZ_TEST(EncodeDecodeAvifFuzzTest, EncodeDecodeGridValid)
     .WithDomains(fuzztest::OneOf(ArbitraryAvifImage(),
                                  ArbitraryAvifImageWithGainMap()),
                  ArbitraryAvifEncoder(),

tests/gtest/avif_fuzztest_read_image.cc

diff --git a/tests/gtest/avif_fuzztest_read_image.cc b/tests/gtest/avif_fuzztest_read_image.cc
index e1c2290..de48e4f 100644
--- a/tests/gtest/avif_fuzztest_read_image.cc
+++ b/tests/gtest/avif_fuzztest_read_image.cc
@@ -92,7 +92,7 @@
 
 constexpr uint32_t kMaxFileSize = 1024 * 1024;  // 1MB.
 
-FUZZ_TEST(DecodeAvifTest, ReadImageFile)
+FUZZ_TEST(ReadImageFuzzTest, ReadImageFile)
     .WithDomains(
         Arbitrary<std::string>()
             .WithMaxSize(kMaxFileSize)