RawTrackerHit has signed data members

### Environment: (where does this bug occur, have you tried other environments)
- Which branch (often `main` for latest released): main
- Which version (or `HEAD` for the most recent on git): HEAD
- Any specific OS or system where the issue occurs? none
- Any special versions of ROOT or Geant4? none

### Steps to reproduce: (give a step by step account of how to trigger the bug)
https://github.com/eic/EDM4eic/blob/1556c6dd2331560efbd7bb39f8e83efdde859987/edm4eic.yaml#LL300-L302

### Expected Result: (what do you expect when you execute the steps above)
`uint32_t` for data words.

### Actual Result: (what do you get when you execute the steps above)
`int32_t` for data words.