SWDEV-311271 - Initial mempool implementation

HIP_MEM_POOL_SUPPORT controls memory pool support in runtime.
Currently it's disabled by default. The initial change doesn't
include: IPC, MGPU, virtual memory alloc, suballoc, defragmentation,
internal dependencies.

Change-Id: Ibed8528ebec698b045ebb247e49c0ecd6e587ed7

hipamd/src/hip_stream.cpp

@@ -407,6 +407,12 @@ hipError_t hipStreamSynchronize(hipStream_t stream) {
   // Wait for the current host queue
   hip::getQueue(stream)->finish();
 
+  // Make sure runtime releases memory for all memory pools on the device,
+  // associated with the queue
+  auto hip_stream = reinterpret_cast<hip::Stream*>(stream);
+  auto device = (hip_stream == nullptr) ? hip::getCurrentDevice() : hip_stream->GetDevice();
+  device->ReleaseFreedMemory(hip_stream);
+
   HIP_RETURN(hipSuccess);
 }