Change hot credential representation in `CommitteeState`

[teodanciu]

Description

• Represent hot keys in CommitteState as a new, more comprehensive type CommitteeAuthorization. For resigned members, this will also contain the anchor registered during resignation.
• Reflect the anchor in the committee query result

Closes https://github.com/IntersectMBO/cardano-ledger/issues/4147

Checklist

• [ ] Commit sequence broadly makes sense and commits have useful messages
• [ ] New tests are added if needed and existing tests are updated
• [ ] When applicable, versions are updated in .cabal and CHANGELOG.md files according to the versioning process.
• [ ] The version bounds in .cabal files for all affected packages are updated. If you change the bounds in a cabal file, that package itself must have a version increase. (See RELEASING.md)
• [ ] All visible changes are prepended to the latest section of a CHANGELOG.md for the affected packages. New section is never added with the code changes. (See RELEASING.md)
• [x] Code is formatted with fourmolu (use scripts/fourmolize.sh)
• [x] Cabal files are formatted (use scripts/cabal-format.sh)
• [x] hie.yaml has been updated (use scripts/gen-hie.sh)
• [ ] Self-reviewed the diff