src: fix --build-sea default executable path

[alexsch01]

Fixes #61579

[nodejs-github-bot]

Review requested:

• @nodejs/single-executable

[alexsch01]

Just compiled it and it runs as expected

[joyeecheung]

Thanks for the PR, can you add a test? I think you may need to use child_process.execSync and tweak the path variables a bit to reproduce it with a shell.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.75%. Comparing base (ae2ffce) to head (643a70e).
⚠️ Report is 40 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61708      +/-   ##
==========================================
- Coverage   89.75%   89.75%   -0.01%     
==========================================
  Files         674      675       +1     
  Lines      204416   204502      +86     
  Branches    39285    39308      +23     
==========================================
+ Hits       183472   183541      +69     
- Misses      13227    13241      +14     
- Partials     7717     7720       +3     

Files with missing lines	Coverage Δ
src/node_sea_bin.cc	41.51% <100.00%> (-0.22%)	⬇️

... and 34 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71220/

[alexsch01]

The only test failure is the same test failing in main right now

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71236/

[nodejs-github-bot]

Landed in 30adc7c