Tupling_veloSP_TupleFromTurbo_ValidateTuple failing

This test is failing since lhcb-master/2072 (2023-07-04) which is when we updated GCC from 11 to 12.

See for example this instance

adding variable for part B
adding variable for part daug1
adding variable for part daug2
Traceback (most recent call last):
  File "/workspace/build/LHCbIntegrationTests/Tupling_veloSP/../Utilities//validator_tuple.py", line 68, in <module>
    main(args.process)
  File "/workspace/build/LHCbIntegrationTests/Tupling_veloSP/../Utilities//validator_tuple.py", line 41, in main
    assert intree.GetEntries()
AttributeError: 'TObject' object has no attribute 'GetEntries'

/cc @pkoppenb @dfazzini