Fix delegating to always-no-confidence

[CarlosLopezDeLara]

Changelog

- description: |
   - Fix delegating to always no confidence default DRep
   - Add golden tests for stake address vote delegation certificates
# uncomment types applicable to the change:
  type:
  # - feature        # introduces a new feature
  # - breaking       # the API has changed in a breaking way
  # - compatible     # the API has changed but is non-breaking
  # - optimisation   # measurable performance improvements
  # - improvement    # QoL changes e.g. refactoring
   - bugfix         # fixes a defect
   - test           # fixes/modifies tests
  # - maintenance    # not directly related to the code
  # - release        # related to a new release preparation
  # - documentation  # change in code docs, haddocks...

Context

Resolves #402
Now it carries the corresponding [3] (it was 2)

[9, [0, h'EF1785CF18928F8353C90E76B7A8FC60855472D31A0EA1C1C774AB01'], [3]]

tests pending

How to trust this PR

              "keyHash-ef1785cf18928f8353c90e76b7a8fc60855472d31a0ea1c1c774ab01": {
                "reward": 310415375988,
                "deposit": 0,
                "ptr": [],
                "spool": "c27cf021914a2b3bcb286d3d741979083422378c577fe757702b6988",
                "drep": {
                  "tag": "DRepAlwaysNoConfidence"
                }
              }
            },

Before it was

              "keyHash-3dc96f0f04fdae3ad3c74182dfe0f720ba06c1ed2b15b78761d71290": {
                "reward": 24703004483,
                "deposit": 0,
                "ptr": [],
                "spool": "3d5e0af9fb0a82c2256faa9eb4f9db6d7b2f0af843b9e3c3dcbbfea6",
                "drep": {
                  "tag": "DRepAlwaysAbstain"
                }
              },

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

[carlhammann]

🎉

[Jimbo4350]

Congrats on your first Haskell PR! 🎉