[Builder]: Generate test file for config struct check

[bogdandrutu]

Updates #4605

[codecov]

Codecov Report

Merging #4594 (5fb64a0) into main (be613cd) will decrease coverage by 0.38%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##             main    #4594      +/-   ##
==========================================
- Coverage   90.75%   90.36%   -0.39%     
==========================================
  Files         178      181       +3     
  Lines       10566    10621      +55     
==========================================
+ Hits         9589     9598       +9     
- Misses        759      797      +38     
- Partials      218      226       +8     

Impacted Files	Coverage Δ
cmd/builder/internal/builder/templates.go	100.00% <ø> (ø)
cmd/builder/internal/builder/main.go	59.74% <77.77%> (-7.29%)	⬇️
cmd/otelcorecol/components.go	52.00% <0.00%> (ø)
cmd/otelcorecol/main_others.go	0.00% <0.00%> (ø)
cmd/otelcorecol/main.go	0.00% <0.00%> (ø)

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[codeboten]

Please rebase