Refactor: prefer chdman and maxcso from $PATH

[emmercm]

Fixes: #1398

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.61%. Comparing base (5a1784b) to head (aa98949).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1443      +/-   ##
==========================================
+ Coverage   92.41%   92.61%   +0.19%     
==========================================
  Files         122      122              
  Lines        7636     7636              
  Branches     1737     1750      +13     
==========================================
+ Hits         7057     7072      +15     
+ Misses        553      539      -14     
+ Partials       26       25       -1     

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