[REF] BIDS : refactor function `create_participants_df` from `bids_utils`

[AliceJoubert]

Small refactor of create_participants_df of bids_utils :

Previously :

• Compared BIDS to clinical data
• Adapted to OASIS and ADNI only
• Using dataframes but not the corresponding existing methods

Planned :

• If possible adapt it to all datasets, at least check on dataset if should not be used for it ; ex AIBL has redundant function
• Simplify code loops
• Tests if needed

Maybe in another function :

• Compare BIDS result to initial raw dataset, available for all types of datasets (same as cleaning sessions/subjects)