feat(pollux): add anoncreds predicate on requests

[goncalo-frade-iohk]

Description:

Add ability to add predicates on anoncreds presentation requests.

Fixes ATL-6848 ATL-6517

Checklist:

• [x] My PR follows the contribution guidelines of this project
• [x] My PR is free of third-party dependencies that don't comply with the Allowlist
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I have checked the PR title to follow the conventional commit specification

[mkbreuningIOHK]

Added ATL-6517 as reference. One question: the check 'I have made corresponding changes to the documentation` is there, but I do not see any document update in this PR. Could you clarify? (by the way, there is another sub-task in Jira for the documentation update).

[goncalo-frade-iohk]

https://github.com/input-output-hk/atala-prism-wallet-sdk-swift/pull/141#issuecomment-2121802130

Although this actually doesn't add any documentation since I removed after since it was not needed anymore.

Documentation changes are comments done in Code 99% of the time not in other file.