Use QuicheTest and quiche_test.h in third_party/http2.

The motivation is that these files have to be included with
#pragma clang diagnostic ignored "-Weverything", otherwise CLs touching test
files will not build.

PiperOrigin-RevId: 334632337
Change-Id: I74d8cdef4b07eed79880d1ca7e0476b3a2c5c184
diff --git a/http2/test_tools/frame_parts.cc b/http2/test_tools/frame_parts.cc
index 7d5c218..7b25299 100644
--- a/http2/test_tools/frame_parts.cc
+++ b/http2/test_tools/frame_parts.cc
@@ -6,12 +6,11 @@
 
 #include <type_traits>
 
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
 #include "net/third_party/quiche/src/http2/http2_structures_test_util.h"
 #include "net/third_party/quiche/src/http2/platform/api/http2_logging.h"
 #include "net/third_party/quiche/src/http2/platform/api/http2_string_utils.h"
 #include "net/third_party/quiche/src/http2/platform/api/http2_test_helpers.h"
+#include "net/third_party/quiche/src/common/platform/api/quiche_test.h"
 
 using ::testing::AssertionFailure;
 using ::testing::AssertionResult;