fix: upload gcs blobs to bucket root

[caarlos0]

add tests to #2373

closes #2373

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[codecov]

Codecov Report

Merging #2409 (f2b6db2) into master (5b3f286) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2409      +/-   ##
==========================================
+ Coverage   82.92%   82.99%   +0.07%     
==========================================
  Files          83       83              
  Lines        6062     6088      +26     
==========================================
+ Hits         5027     5053      +26     
+ Misses        887      886       -1     
- Partials      148      149       +1     

Impacted Files	Coverage Δ
internal/pipe/blob/upload.go	73.80% <100.00%> (+0.31%)	⬆️
internal/pipe/docker/manifest.go	96.66% <0.00%> (-3.34%)	⬇️
internal/pipe/docker/docker.go	89.18% <0.00%> (-1.53%)	⬇️
internal/pipe/scoop/scoop.go	78.65% <0.00%> (-0.39%)	⬇️
pkg/config/config.go	90.72% <0.00%> (ø)
internal/builders/golang/build.go	92.89% <0.00%> (+0.20%)	⬆️
internal/exec/exec.go	85.60% <0.00%> (+0.23%)	⬆️
internal/pipe/gomod/gomod.go	78.44% <0.00%> (+0.37%)	⬆️
internal/builders/golang/targets.go	100.00% <0.00%> (+6.52%)	⬆️

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.