[tsan] Enable test on linux (#99659)

It passes as-is on my system.

Author: vitalybuka

compiler-rt/test/tsan/debug_alloc_stack.cpp

@@ -1,9 +1,6 @@
 // RUN: %clangxx_tsan -O0 %s -o %t
 // RUN: env %env_tsan_opts=stack_trace_format=DEFAULT %deflake %run %t 2>&1 | FileCheck %s
 
-// Until I figure out how to make this test work on Linux
-// REQUIRES: system-darwin
-
 #include "test.h"
 #include <pthread.h>
 #include <stdint.h>