fix: alwaysRedirect does not work with redirectOn 'all' and 'no prefix'

[borghol]

🔗 Linked issue

#1859

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 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)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

When the strategy is set to anything except 'no_prefix' and with alwaysRedirect enabled, redirection only happens on the root path. This change modifies the check when alwaysRedirect is set to check redirectOn strategy before choosing to redirect.

Previously, going to a page like '/about' would not redirect to '/fr/about' because it is not the root. This fix will allow us to redirect correctly so that '/about' and '/ja/about' will redirect to '/fr/about' when using 'all', and redirect '/about' to '/fr/about' when using 'no prefix'

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[borghol]

@kazupon I'm not sure but I think the check is stuck. I checked the linked Netlify build and it was completed

[kazupon]

Thank you for your contribution!
I’ll check your PR soon.

[kazupon]

That's great works!
Thanks!