build: update test-wpt-report to use NODE instead of OUT_NODE

[panva]

#60850 updated a target that never runs with Debug builds, this broke the ability for CI to upload daily wpt.fyi reports

This PR reverts the test-wpt-report target to use NODE which is what CI consistently sets

Refs: https://openjs-foundation.slack.com/archives/C03BJP63CH0/p1765400746909869

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.02%. Comparing base (e28656a) to head (2d99ee4).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61024      +/-   ##
==========================================
- Coverage   88.51%   88.02%   -0.50%     
==========================================
  Files         703      703              
  Lines      208496   208522      +26     
  Branches    40213    40128      -85     
==========================================
- Hits       184555   183548    -1007     
- Misses      15955    16935     +980     
- Partials     7986     8039      +53     

see 112 files with indirect coverage changes

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