[chore]: enable usestdlibvars linter

[mmorel-35]

Description

usestdlibvars is a linter that detect the possibility to use variables/constants from the Go standard library.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 66.9%. Comparing base (9d3f756) to head (8f0fc3f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...p/httptrace/otelhttptrace/example/client/client.go	0.0%	1 Missing ⚠️
...ntation/net/http/otelhttp/example/client/client.go	0.0%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #6367   +/-   ##
=====================================
  Coverage   66.9%   66.9%           
=====================================
  Files        193     193           
  Lines      15652   15652           
=====================================
+ Hits       10480   10483    +3     
+ Misses      4881    4879    -2     
+ Partials     291     290    -1     

Files with missing lines	Coverage Δ
detectors/azure/azurevm/vm.go	90.7% <100.0%> (ø)
instrumentation/net/http/otelhttp/client.go	57.1% <100.0%> (ø)
...p/httptrace/otelhttptrace/example/client/client.go	0.0% <0.0%> (ø)
...ntation/net/http/otelhttp/example/client/client.go	0.0% <0.0%> (ø)

... and 1 file with indirect coverage changes

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests