Differentiate schema locations

[ronaldtse]

Metanorma PR checklist

• [ ] Breaking changes (list related PRs)
• [ ] Documentation update required (create task for this)
• [ ] External dependency introduced (documentation update need)
• [ ] Gem with native library introduced

[ronaldtse]

There is a failure on Ruby 3.2 on Ubuntu due to Expressir core dumping on a test, but ignoring it right now.