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

Attention: Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.

Project coverage is 75.52%. Comparing base (efb08dd) to head (280eabf).
Report is 1377 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/core/cobra_usage_builder.go	62.50%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            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     

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