[UT] Increase stack size for StandaloneTests to 480 (#1616)

Signed-off-by: nileshnegi <Nilesh.Negi@amd.com>

[ROCm/rccl commit: d6b987a53f]

projects/rccl/test/common/StandaloneUtils.hpp

@@ -26,7 +26,7 @@
 } while(0)
 
 // should be 112, temp fix to make CI pass
-#define MAX_STACK_SIZE 448
+#define MAX_STACK_SIZE 480
 
 #ifdef ENABLE_LL128
 #define MAX_STACK_SIZE_gfx90a 320
@@ -52,4 +52,4 @@ namespace RcclUnitTesting
 
     ArchInfo parseMetadata(const std::vector<std::string>& list);
 }
-#endif
+#endif