Drep certification registration: add parameters for anchor

[smelc]

Changelog

- description: |
    Add `--drep-metadata-url` and `--drep-metadata-hash` to the drep registration certificate command
# 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

Closes #198

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• The change log section in the PR description has been filled in
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • round trip tests
  • integration tests
    See Running tests for more details
• NA The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• The changelog section in the PR is updated to describe the change
• Self-reviewed the diff

[CarlosLopezDeLara]

Looks good! thank you

➜  testdreps cardano-cli conway governance drep registration-certificate \
--drep-verification-key-file drep.vkey \
--key-reg-deposit-amt 0 \
--drep-metadata-url drep.url \
--drep-metadata-hash 52e69500a92d80f2126c836a4903dc582006709f004cf7a28ed648f732dff8d2 \
--out-file drep-reg.cert
➜  testdreps cat drep-reg.cert
{
    "type": "CertificateShelley",
    "description": "DRep Key Registration Certificate",
    "cborHex": "84108200581c95591451fb3899fcc8db3450741d9de6123a78e03ef39bf4a65ed5cf008268647265702e75726c582052e69500a92d80f2126c836a4903dc582006709f004cf7a28ed648f732dff8d2"
}

[16, [0, h'95591451FB3899FCC8DB3450741D9DE6123A78E03EF39BF4A65ED5CF'], 0, ["drep.url", h'52E69500A92D80F2126C836A4903DC582006709F004CF7A28ED648F732DFF8D2']]

[smelc]

cc @Jimbo4350 and @newhoggy if you want to have a look before merging. Short simple PR with green CI.

[Jimbo4350]

Needs to be rebased. Having a look now.

[Jimbo4350]

LGTM! One simplifying suggestion