refactoring: drop setup name

[MatousJobanek]

No functional changes introduced, only dropping the obsolete "setup" name from all variables and files

[codecov]

Codecov Report

Merging #32 (a65919f) into master (11f8a31) will decrease coverage by 0.04%.
The diff coverage is 66.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #32      +/-   ##
==========================================
- Coverage   65.76%   65.72%   -0.04%     
==========================================
  Files          40       40              
  Lines        2030     2028       -2     
==========================================
- Hits         1335     1333       -2     
  Misses        537      537              
  Partials      158      158              

Files	Coverage Δ
pkg/assets/assets.go	63.63% <100.00%> (-3.04%)	⬇️
pkg/cmd/generate/cluster.go	82.60% <ø> (ø)
pkg/cmd/generate/util.go	75.83% <100.00%> (ø)
pkg/cmd/generate/admin-manifests.go	37.73% <81.81%> (ø)
pkg/cmd/generate/generate.go	0.00% <0.00%> (ø)