chore: use `tinyexec`

[BobbieGoede]

🔗 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)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [x] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Same as https://github.com/nuxt/nuxt/pull/28684

Tried tinyexec in the test-utils 'fork' used in the i18n module, besides reducing dependencies it seems to perform better than execa when running with CI=1 (based on very basic & lazy testing).

[BobbieGoede]

I also raised the timeouts for windows browser tests, while it may be slower at least we can be sure that the tests succeed.