fix: `switchLocalePath` not working with `vue-router@^4.3.1`

[BobbieGoede]

🔗 Linked issue

• 2920

• https://github.com/vuejs/router/pull/2189

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [x] 🐞 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 #2920

This PR changes the route resolution to take into account the change in https://github.com/vuejs/router/pull/2189, this broke switchLocalePath as Vue Router now prioritizes fullPath during resolution if present to prevent unnecessarily encoding/decoding.

Small changes to the routing tests had to be made but these actually show that the route is resolved more accurately as query parameter order is preserved.

📝 Checklist

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