test: update test-child-process-bad-stdio to use node:test

[cjihrig]

This commit updates test/parallel/test-child-process-bad-stdio.js to use node:test. This change prevents multiple child processes from being spawned in parallel, which can be problematic in the CI.

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/64450/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.18%. Comparing base (0576deb) to head (aed37c0).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #56562      +/-   ##
==========================================
- Coverage   89.18%   89.18%   -0.01%     
==========================================
  Files         662      662              
  Lines      191751   191751              
  Branches    36909    36904       -5     
==========================================
- Hits       171008   171007       -1     
- Misses      13604    13608       +4     
+ Partials     7139     7136       -3     

see 39 files with indirect coverage changes