Test: Change max stack size to 520 to accomodate new ROCm changes.

[ROCm/rccl commit: 523e0893e4]

projects/rccl/test/common/StandaloneUtils.hpp

@@ -25,8 +25,7 @@
     }                                                           \
 } while(0)
 
-// should be 112, temp fix to make CI pass
-#define MAX_STACK_SIZE 496
+#define MAX_STACK_SIZE 520
 
 #ifdef ENABLE_LL128
 #define MAX_STACK_SIZE_gfx90a 360