fix: only optimize configured locale files

[BobbieGoede]

🔗 Linked issue

• vue-i18n messages unable to use imports from i18n/locales #3404

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Resolves #3404

This makes the locale resource filter more accurate by passing the actual locale file paths instead of scanning for files in langDir, this should prevent errors caused by optimizing unsupported files.

📝 Checklist

• I have linked an issue or discussion.
• I have added tests (if possible).
• I have updated the documentation accordingly.

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxtjs/i18n@3433

commit: 9526897