SWDEV-514959 - Fix memory leaks in streamperthread tests (#14)

Change-Id: I7b133d422f675d45050d7f724d632fa2dc997baf

catch/unit/streamperthread/hipStreamPerThread_MultiThread.cc

@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2021 Advanced Micro Devices, Inc. All rights reserved.
+Copyright (c) 2025 Advanced Micro Devices, Inc. All rights reserved.
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
@@ -34,6 +34,9 @@ static void Copy_to_device() {
   }
   HIP_CHECK(hipMemcpyAsync(A_d, A_h, ele_size * sizeof(int), hipMemcpyHostToDevice,
                  hipStreamPerThread));
+  // Clean up
+  HIP_CHECK(hipHostFree(A_h));
+  HIP_CHECK(hipFree(A_d));
 }
 
 /*