Add APIv4 CRUD actions

[mflandorfer]

This will create generic APIv4 classes for all banking entities and update existing DAO classes as a result of civix generate:entity-boilerplate.

[jensschuppe]

Though BankAccount and BankAccountReference will be migrated to https://lab.civicrm.org/extensions/bank_account, I think having a last version of CiviBanking with them included (and thus having API4 entities for them) won't do any harm.

[MarcMichalsky]

Works great! Thanks @mflandorfer and @pfigel for implementing it!