SWDEV-545476 - memleak valgrind fixes for atomics and compiler (#470)

fixes SWDEV-545476 and SWDEV-545493

catch/unit/atomics/unsafeAtomicAdd.cc

@@ -172,6 +172,7 @@ TEMPLATE_TEST_CASE("Unit_unsafe_atomic_add_half_and_bfloat", "", __half2, __hip_
 
   REQUIRE(hout.x == 32.0f);
   REQUIRE(hout.y == 64.0f);
+  HIP_CHECK(hipFree(out));
 }
 
 /**