[chore] Add gosec via golangci-lint

[pellared]

Towards #4597

[codecov]

Codecov Report

Merging #4645 (eb7a82c) into main (78ea001) will decrease coverage by 0.1%.
The diff coverage is 50.0%.

@@           Coverage Diff           @@
##            main   #4645     +/-   ##
=======================================
- Coverage   81.3%   81.3%   -0.1%     
=======================================
  Files        222     222             
  Lines      17682   17690      +8     
=======================================
+ Hits       14389   14393      +4     
- Misses      2993    2997      +4     
  Partials     300     300             

Files	Coverage Δ
...pmetric/otlpmetrichttp/internal/otest/collector.go	54.6% <100.0%> (+0.7%)	⬆️
sdk/resource/env.go	94.0% <ø> (ø)
...pmetric/otlpmetricgrpc/internal/otest/collector.go	22.8% <0.0%> (-0.4%)	⬇️