This MR fixes two problem that occured with ByteStream overlay test jobs:
- Configuring the DB access of the LAr sampling fractions (reported as ATLASSIM-4262)
- Setting the SG key for the Shape object retrieved by the LArPileUpTool to the key for data.
- Proper SG keys for LArDigits and LArRawChannels
To avoid any misunderstanding: This addresses only the old job-config (nothing to do with ComponentAccumulator)