Preliminary ghc-9.14 support

[erikd]

Description

Preliminary ghc-9.14 support. Currently using ghc-9.14.0.20251007.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated
• All visible changes are prepended to the latest section of a CHANGELOG.md for the affected packages.
  New section is never added with the code changes. (See RELEASING.md)
• When applicable, versions are updated in .cabal and CHANGELOG.md files according to the
  versioning process.
• The version bounds in .cabal files for all affected packages are updated.
  If you change the bounds in a cabal file, that package itself must have a version increase. (See RELEASING.md)
• Self-reviewed the diff

[erikd]

Have no idea what the fourmolu check is complaining about. Maybe it does not like CPP. When I run it locally it does not make any changes but exits with error code 102 like it does in CI.

[lehins]

Same comment about CPP as in IntersectMBO/cardano-ledger#5292