Cardano Updates

- Remove redundant toList calls (Foldable constraint suffices)
- Use flip instead of section application
- Move reverse out of pipeline

- iohk-nix: remove rev pin to personal branch hkm/update-blst
  (blst v0.3.14 is now on master)
- mithril: update from hotfix/2543.1 to release 2603.1
- haskell.nix + hackage.nix: update to latest master
- ruby_3_1 → ruby_3_3: ruby 3.1 removed in newer nixpkgs

Closes #5218, closes #5219, closes #5220

haskell.nix's nixpkgs ships mdbook-mermaid 0.17 which uses
mdbook-preprocessor 0.5 (requires mdbook 0.5), but still has
mdbook 0.4.52. Pin mdbook-mermaid from the previous nixpkgs
until haskell.nix bumps mdbook.

- Remove redundant toList calls (Foldable constraint suffices)
- Use flip instead of section application
- Move reverse out of pipeline