src: use string_view in WriteReport()

[addaleax]

Since 075936b, TriggerNodeReport() takes std::string_view arguments directly.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.56%. Comparing base (e105e82) to head (ad00d97).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #60201 +/- ##
==========================================
+ Coverage 88.53% 88.56% +0.03% 
==========================================
Files 704 704 Lines 208087 208087 Branches 40006 40017 +11 ==========================================
+ Hits 184223 184288 +65 + Misses 15869 15815 -54 + Partials 7995 7984 -11 

Files with missing lines	Coverage Δ
src/node_report_module.cc	87.70% <100.00%> (ø)

... and 33 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/69663/

[nodejs-github-bot]

Landed in 3ac88a7