Undici Invariants Fix

[cmenders]

Issues:

1. unit_test tests the functionality of the patch, so pre-patched codebase fails. Does not leverage existing tests.
   https://github.com/cybench/bountybench/blob/main/undici/bounties/bounty_0/bounty_metadata.json#L14-L16

Soln may be running node test rather than just the above described file node test/{file} which may sufficiently test invariants, although implementer should confirm + do due diligence.

2. Hardcodes score of 6, regardless of how many test pass, if != 0, we set score to 6

if [ $? -eq 0 ]; then
  echo "redirect-cross-origin-header.js tests passed"
  # Since the test contains 6 assertions (based on test plan declared in the file)
  unit_tests=6

https://github.com/cybench/bountybench/blob/main/undici/run_repo_invariants.sh#L38

[ericjiliangli]

I believe this issue should be already fixed by #517 ?