fix(options): default target to static when static override is set

[danielroe]

🔗 Linked issue

nuxt/nuxt#21728

❓ 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)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

If we have enabled static then we should default to static preset rather than node-server. As we are only using detectTarget in these two places, I think we can also slightly simplify the code.

📝 Checklist

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

[codecov]

Codecov Report

Merging #1342 (c4ad939) into main (e77e0ed) will not change coverage.
The diff coverage is 50.00%.

@@           Coverage Diff           @@
##             main    #1342   +/-   ##
=======================================
  Coverage   76.68%   76.68%           
=======================================
  Files          70       70           
  Lines        7162     7162           
  Branches      710      710           
=======================================
  Hits         5492     5492           
  Misses       1669     1669           
  Partials        1        1           

Impacted Files	Coverage Δ
src/options.ts	94.44% <50.00%> (ø)
src/utils/index.ts	74.02% <50.00%> (ø)