Add golint support for M1 macs (darwin/arm64 arch)

[ricardo-larosa]

Fixes: #5434

Description

• Bump golint version to 1.37.1 which now supports darwin/arm64 arch
• Add darwin/arm64 to hack/install_golint.sh
• Fix golint/gocritic issues (spaces, use of ReplaceAll)
• Fix shadowing of defer os.Exit(0) in cmd_test.go

[codecov]

Codecov Report

Merging #5435 (60b3f7d) into master (4588f51) will decrease coverage by 0.02%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master    #5435      +/-   ##
==========================================
- Coverage   71.40%   71.37%   -0.03%     
==========================================
  Files         397      397              
  Lines       14543    14543              
==========================================
- Hits        10384    10380       -4     
- Misses       3388     3390       +2     
- Partials      771      773       +2     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/flags.go	87.50% <ø> (ø)
pkg/skaffold/initializer/analyze/directory.go	50.00% <ø> (ø)
...affold/kubernetes/portforward/kubectl_forwarder.go	67.60% <ø> (ø)
pkg/skaffold/runner/new.go	67.58% <0.00%> (ø)
pkg/skaffold/runner/render.go	12.50% <ø> (ø)
pkg/skaffold/schema/latest/config.go	58.82% <ø> (ø)
pkg/skaffold/schema/v2beta10/config.go	100.00% <ø> (ø)
pkg/skaffold/schema/v2beta11/config.go	20.58% <ø> (ø)
pkg/skaffold/schema/v2beta12/config.go	20.58% <ø> (ø)
pkg/skaffold/schema/v2beta9/config.go	100.00% <ø> (ø)
... and 9 more

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