[Backport 1.8.latest] Global CLI flag should override env var flag

[github-actions]

Backport 601fee0 from #10423.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.29%. Comparing base (d66c32a) to head (829a2dc).

Additional details and impacted files

@@              Coverage Diff               @@
##           1.8.latest   #10427      +/-   ##
==============================================
- Coverage       88.32%   88.29%   -0.03%     
==============================================
  Files             181      181              
  Lines           22767    22771       +4     
==============================================
- Hits            20108    20106       -2     
- Misses           2659     2665       +6     

Flag	Coverage Δ
integration	85.55% <100.00%> (-0.05%)	⬇️
unit	62.77% <100.00%> (+<0.01%)	⬆️

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