[tracegen] Allow to control cardinality of attribute keys

[yurishkuro]

Description of the changes

• Add flag to control cardinality of attribute keys
• Use prime numbers for default number of attributes and keys

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.01% 🎉

Comparison is base (369219c) 97.07% compared to head (f2f34eb) 97.09%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4634      +/-   ##
==========================================
+ Coverage   97.07%   97.09%   +0.01%     
==========================================
  Files         301      301              
  Lines       17878    17878              
==========================================
+ Hits        17355    17358       +3     
+ Misses        419      417       -2     
+ Partials      104      103       -1     

Flag	Coverage Δ
unittests	97.09% <ø> (+0.01%)	⬆️

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see 1 file with indirect coverage changes

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