Remove direct dependencies from cardano-ledger-*

[palas]

Changelog

- description: |
    Removed dependencies from `cardano-ledger-shelley`, `cardano-ledger-core`, and `cardano-ledger-api`.
  type:
  - refactoring    # QoL changes

Context

As part of the work targeted at addressing issues pointed out in IntersectMBO/cardano-api#608, this PR aims to remove all direct dependencies of cardano-cli from ledger.

How to trust this PR

Make sure it is just a refactoring.

Look at it in conjunction with: IntersectMBO/cardano-api#656

Take advantage that there are one commit for shelley, one for core, and one for api (same for the corresponding PR in cardano-api)

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. See Running tests for more details
• Self-reviewed the diff