Add ability to disable BCM

Fatras does not simulate the BCM, and therefore when RawInfoSummaryForTagWriter attempts to retrieve BCM RDOs, dereferencing the associated VarHandle fails and leads to a crash.

Instead of introducing a new property explicitly, this commit uses the auto-declaring property constructor for the associated ReadHandleKey; to disable the reading of BCM RDOs, this key can be made empty in job configuration, which will record zero BCM hits in the RISFTobject.

When using Fatras-based simulators, disable the reading of BCM RDOs with:

--preExec <...> 'RAWtoESD:from EventTagRawAlgs.EventTagRawAlgsConf import RawInfoSummaryForTagWriter;RawInfoSummaryForTagWriter.BCM_RDOKey=""';

Closes ATLASSIM-4561