[CI] Do not run reviewer lottery for dependabot and mergify (backport #946)

[mergify]

This is an automatic backport of pull request #946 done by Mergify.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (91815a4) 44.81% compared to head (74623bf) 45.43%.
Report is 8 commits behind head on humble.

Additional details and impacted files

@@            Coverage Diff             @@
##           humble     #947      +/-   ##
==========================================
+ Coverage   44.81%   45.43%   +0.61%     
==========================================
  Files          40       40              
  Lines        3713     3713              
  Branches     1769     1769              
==========================================
+ Hits         1664     1687      +23     
+ Misses        835      811      -24     
- Partials     1214     1215       +1     

Flag	Coverage Δ
unittests	45.43% <ø> (+0.61%)	⬆️

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see 2 files with indirect coverage changes