Fix memory leak in mm digi
This MR fixes a memory leak in the event loop of the MM digitization. The electrons created in the drift gap were not deleted from the memory. Introducing shared pointers is solving this problem. Addresses ATLSWUPGR-113
This MR fixes a memory leak in the event loop of the MM digitization. The electrons created in the drift gap were not deleted from the memory. Introducing shared pointers is solving this problem. Addresses ATLSWUPGR-113