Update Procedures for Optional Features

[Wind4Greg]

The optional features (anonymous holder binding, pseudonyms with known PID, and pseudonyms with hidden PID) are dependent on two IETF drafts which have recently been updated:

1. BBS Blind Signatures
2. BBS per Verifier Lin

The procedures, in particular, sections 3.4.5 Base Proof Serialization (bbs-2023), 3.4.6 Add Derived Proof (bbs-2023), 3.4.7 Verify Derived Proof (bbs-2023) and some of their sub-procedures need to be updated to use the updated APIs from these drafts.