cardano-testnet | Add correct contents for proposal anchor and constitution

[carbolymer]

Description

Adds correct contents for proposal anchor and the constitution located at urls used in tests.

Otherwise, those tests will fail with cardano-cli 10.1.1.0.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
  • integration tests
    See Runnings tests for more details
• Any changes are noted in the CHANGELOG.md for affected package
• 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
• Self-reviewed the diff

Note on CI

If your PR is from a fork, the necessary CI jobs won't trigger automatically for security reasons.
You will need to get someone with write privileges. Please contact IOG node developers to do this
for you.

[erikd]

LGTM

[Jimbo4350]

Why not define a value in Testnet.Defaults ?

[carbolymer]

@Jimbo4350 because someone posted the constitution file without EOL at the end of file under that URL. I've spent 30 minutes trying to inline it to Testnet.Defaults without success - Haskell (even using ByteString) somehow always puts EOL when writing to a file, which results in a hash mismatch.

I've also wasted time looking for a hash mismatch in a proposal anchor because of trailing whitespaces there. 😠