fix(nitro): replace global. in fewer instances

[danielroe]

🔗 Linked issue

resolves nuxt/nuxt#12777, resolves nuxt/nuxt#13327

❓ 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

We were being a little over-zealous in our replacement. I hope a stray global. won't slip through the net, but by adding a specific list of possible values to replace, we can improve things.

An alternative, which is quite tempting, is to write our own rollup plugin that would add a RegExp that's more precisely targeted to this need (vs @rollup/plugin-replace which only supports non-RE delimiters).

📝 Checklist

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

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