src: fix argv memory leaking in FixupArgsForSEA

[CGQAQ]

It was allocated here

[nodejs-github-bot]

Review requested:

• @nodejs/single-executable

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.43%. Comparing base (45c6a9e) to head (d3552b9).
⚠️ Report is 2974 commits behind head on main.

Files with missing lines	Patch %	Lines
src/node.cc	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #55579      +/-   ##
==========================================
+ Coverage   88.36%   88.43%   +0.07%     
==========================================
  Files         652      654       +2     
  Lines      187245   187731     +486     
  Branches    35990    36137     +147     
==========================================
+ Hits       165451   166018     +567     
+ Misses      15074    14953     -121     
- Partials     6720     6760      +40     

Files with missing lines	Coverage Δ
src/node.cc	73.82% <80.00%> (-0.42%)	⬇️

... and 59 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/70596/