Remove deprecated functions and update types and update writeTxFileTextEnvelopeCddl to use new format

[palas]

Changelog

- description: |
    Removed `serialiseTxLedgerCddl` and `deserialiseTxLedgerCddl`, and updated `writeTxFileTextEnvelopeCddl` to use new format.
  type:
  - breaking

Context

serialiseTxLedgerCddl and deserialiseTxLedgerCddl have been deprecated for two months, so I am removing them. Just realised writeTxFileTextEnvelopeCddl is still using the old format, so I updated that and I will remove the compatibility layer in two months.

How to trust this PR

Check that what I say in Context is true. Also that I haven't removed any still relevant tests.

Check together with: IntersectMBO/cardano-cli#1052

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

[carbolymer]

LGTM. I agree with @Jimbo4350, we should try to preserve those tests.

[Jimbo4350]

So the overall aim is to remove the module Cardano.Api.Internal.SerialiseLedgerCddl in its entirety and have functions like legacyComparison used in Cardano.Api.Internal.SerialiseTextEnvelope to maintain backwards compatibility wrt deserialization. Can you create an issue for this? We should also require decode only tests upon the final removal.

[palas]

Backport: https://github.com/IntersectMBO/cardano-api/tree/remove-deprecated-functions-backport