ci: rework test matrix

[danielroe]

🔗 Linked issue

❓ 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

In preparation for RC, this change makes it more possible to run separate matrices of bridge configuration to catch edge cases in user projects as they adopt Bridge on the way to Nuxt 3.

📝 Checklist

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

[AndreyYolkin]

This is really solid addition. I think it would be great if you could also include some "non-nitro" tests in this matrix. It would help ensure that everything in this setup is working properly too!