fix: capture stderr in executil RunWithExecRunOpts (cherry-pick #25139 for 3.2)

[argo-cd-cherry-pick-bot]

Cherry-picked fix: capture stderr in executil RunWithExecRunOpts (#25139)

Signed-off-by: Eugene Doudine [email protected]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.04%. Comparing base (be8e79e) to head (bbe3b58).
⚠️ Report is 2 commits behind head on release-3.2.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-3.2   #25140      +/-   ##
===============================================
- Coverage        62.07%   62.04%   -0.04%     
===============================================
  Files              351      351              
  Lines            49028    49028              
===============================================
- Hits             30436    30421      -15     
- Misses           15673    15681       +8     
- Partials          2919     2926       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.