feat: improve universal binaries on krew/brew/gofish

[caarlos0]

only use universal binaries on brew/krew/gofish if they replace single-arch ones, otherwise, use the platform-specific ones.

closes #2641

[codecov]

Codecov Report

Merging #2747 (a54f300) into main (5025a36) will increase coverage by 0.00%.
The diff coverage is 90.00%.

@@           Coverage Diff           @@
##             main    #2747   +/-   ##
=======================================
  Coverage   84.93%   84.93%           
=======================================
  Files         105      105           
  Lines        7977     7992   +15     
=======================================
+ Hits         6775     6788   +13     
- Misses        984      986    +2     
  Partials      218      218           

Impacted Files	Coverage Δ
internal/artifact/artifact.go	97.69% <50.00%> (-0.90%)	⬇️
internal/pipe/archive/archive.go	94.44% <100.00%> (+0.04%)	⬆️
internal/pipe/brew/brew.go	84.84% <100.00%> (+0.05%)	⬆️
internal/pipe/gofish/gofish.go	77.72% <100.00%> (+0.09%)	⬆️
internal/pipe/krew/krew.go	85.65% <100.00%> (+0.06%)	⬆️
internal/pipe/universalbinary/universalbinary.go	84.41% <100.00%> (+0.63%)	⬆️

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