perf(core): cobra builder allocate with nb of commands and use unordered list

[Codelax]

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Relates OR Closes #0000

Release note for CHANGELOG:

[codecov-commenter]

Codecov Report

Merging #2702 (280eabf) into master (efb08dd) will decrease coverage by 0.03%.
The diff coverage is 78.57%.

@@            Coverage Diff             @@
##           master    #2702      +/-   ##
==========================================
- Coverage   75.55%   75.52%   -0.04%     
==========================================
  Files         134      134              
  Lines       25031    25042      +11     
==========================================
  Hits        18913    18913              
- Misses       5477     5487      +10     
- Partials      641      642       +1     

Impacted Files	Coverage Δ
internal/core/cobra_usage_builder.go	55.84% <62.50%> (+0.77%)	⬆️
internal/core/cobra_builder.go	87.50% <100.00%> (+0.40%)	⬆️
internal/core/command.go	44.85% <0.00%> (-5.89%)	⬇️

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