[build-utils] Use @vercel/static for zero-config

[TooTallNate]

Now that @vercel/static works in production, we can update
to use it for zero-config.

[codecov]

Codecov Report

Merging #4345 into master will increase coverage by 0.70%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4345      +/-   ##
==========================================
+ Coverage   13.80%   14.51%   +0.70%     
==========================================
  Files         294      294              
  Lines       10408    10513     +105     
  Branches     1338     1311      -27     
==========================================
+ Hits         1437     1526      +89     
- Misses       8881     8905      +24     
+ Partials       90       82       -8     

Impacted Files	Coverage Δ
src/util/dev/server.ts	60.63% <0.00%> (+4.32%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8f108c5...b003c74. Read the comment docs.