Fix integration tests

[aphralG]

Proposed changes

Fix failing integration tests

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

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[codecov-commenter]

Codecov Report

Patch coverage: 88.88% and project coverage change: -0.16% ⚠️

Comparison is base (556f51e) 66.44% compared to head (603ca88) 66.29%.
Report is 1 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #478      +/-   ##
==========================================
- Coverage   66.44%   66.29%   -0.16%     
==========================================
  Files         118      118              
  Lines       13390    13391       +1     
==========================================
- Hits         8897     8877      -20     
- Misses       3903     3924      +21     
  Partials      590      590              

Files Changed	Coverage Δ
src/core/pipe.go	54.09% <50.00%> (ø)
...dor/github.com/nginx/agent/v2/src/plugins/nginx.go	72.19% <100.00%> (+0.04%)	⬆️

... and 1 file with indirect coverage changes

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