fix(ingress-nginx): filter out healthcheck traces

[dmehala]

Description

By default, ingress-nginx defines the /nginx_status endpoint. This configuration causes unnecessary traces to be sent to Datadog.

This commit updates the sampling rules to exclude traces originating from this endpoint.

Note to Reviewer

This change serves as a temporary workaround. In the long term, our module should be updated to avoid generating traces when stub_status is enabled.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.42%. Comparing base (70273f4) to head (724f09b).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/tracing_library.cpp	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #263      +/-   ##
==========================================
- Coverage   68.85%   68.42%   -0.44%     
==========================================
  Files          56       56              
  Lines        7389     6030    -1359     
  Branches     1049     1049              
==========================================
- Hits         5088     4126     -962     
+ Misses       1794     1397     -397     
  Partials      507      507              

Files with missing lines	Coverage Δ
src/tracing_library.cpp	74.07% <0.00%> (-7.14%)	⬇️

... and 51 files with indirect coverage changes

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