pkg/parser: avoid calling spew unless trace

[mmetc]

No description provided.

[github-actions]

@mmetc: There are no area labels on this PR. You can add as many areas as you see fit.

• /area agent
• /area local-api
• /area cscli
• /area appsec
• /area security
• /area configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.96%. Comparing base (58d6821) to head (2d1b9a8).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4156      +/-   ##
==========================================
- Coverage   63.54%   62.96%   -0.59%     
==========================================
  Files         450      467      +17     
  Lines       32562    33294     +732     
==========================================
+ Hits        20693    20964     +271     
- Misses       9798    10216     +418     
- Partials     2071     2114      +43     

Flag	Coverage Δ
bats	46.13% <100.00%> (+0.04%)	⬆️
unit-linux	35.78% <0.00%> (+0.01%)	⬆️
unit-windows	25.04% <0.00%> (?)

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