cppgc: Ignore stack scan tests for TSAN

Tbr: bikineev@chromium.org
No-try: true
Bug: chromium:1056170
Change-Id: I4872b617b038bc647543a3dd5a435ad82c7291ba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2132792Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66960}

test/unittests/heap/cppgc/stack_unittest.cc

@@ -47,6 +47,7 @@ TEST_F(GCStackTest, IsOnStackForHeapValue) {
 }
 
 #ifdef CPPGC_SUPPORTS_CONSERVATIVE_STACK_SCAN
+#ifndef THREAD_SANITIZER
 
 namespace {
 
@@ -356,6 +357,7 @@ TEST_F(GCStackTest, StackAlignment) {
 #endif  // V8_OS_LINUX && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64)
 
 #endif  // CPPGC_SUPPORTS_CONSERVATIVE_STACK_SCAN
+#endif  // !THREAD_SANITIZER
 
 }  // namespace internal
 }  // namespace cppgc