governance: add hash command and remove text/file hash arguments of existing commands

[smelc]

Changelog

- description: |
    Add command `governance hash (--file-binary|--file-text|--text)`.
    
    Remove flags: `--proposal-anchor-metadata-file`, `--proposal-anchor-metadata`,
    `--vote-anchor-metadata`, and `--vote-anchor-metadata-file`.
    
    To handle the removing of flags, call `cardano-cli conway governance hash` and pass the file or text to hash,
    and then pass the result of this command to the governance action you used to call directly
    (`create-constitution`, `update-committee`, `create-info`, `create-no-confidence`, `create-protocol-parameters-update`, `create-treasury-widthdrawal`, `vote create`).
  
    Rename `--proposal-anchor-url` to `--anchor-url`
    Rename `--proposal-anchor-metadata-hash` to `--anchor-data-hash`
    Rename `--vote-anchor-metadata-hash` to `--anchor-data-hash`
# 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...

Roadmap to finish this PR

• Add new governance hash command
• Adapt create-info
• Adapt update-committee
• Integrate action update-committee: add golden test #383 in this PR, to see how multi platform tests go.
• Adapt create-constitution
• Adapt create-no-confidence
• Adapt create-protocol-parameters-update
• Adapt create-treasury-withdrawal
• Adapt conway governance vote create

Context

• Fixes cardano-cli conway governance action create-constitution: rework hash arguments #420
• Fixes Add a golden test of update-committee #359

Follow-up issues (to make this PR smaller):

• Allow conway governance hash to write output to a file #446
• Align create-constitution flags with --anchor-(url|data-hash) new behavior #447

How to review this PR

• Look at the diffs in help files
• Look at the diffs in changed tests
• You can look at the entire diff at once. I have the PR structured in multiple commits for my own tracking, but that doesn't really help review here.

Sorry, no smarter way to trust this change 😆

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

[Jimbo4350]

I still disagree with this naming because it is ambiguous.

hashAnchorData :: forall c. Crypto c => AnchorData -> SafeHash c AnchorData
hashAnchorData = hashWithCrypto (Proxy @c)

data Anchor c = Anchor
  { anchorUrl :: !Url
  , anchorDataHash :: !(SafeHash c AnchorData)
  }
  deriving (Eq, Ord, Show, Generic)

This is not the hash of the Anchor. It is the hash of the Anchor's metadata. I think people will wrongly assume the URL is also hashed. We can reduce metadata to data or come up with something else.

Feedback has been applied