move related_transaction out of QueryParams

[matin]

related_transaction should not be directly specified in QueryParams:
https://github.com/cuenca-mx/cuenca-validations/blob/main/cuenca_validations/types/queries.py#L32

It should be moved elsewhere

[alexviquez]

move to BalanceEntryQuery:

class BalanceEntryQuery(QueryParams):
    funding_instrument_uri: Optional[str] = None
    related_transaction_uri: Optional[str] = None