[Release 1.27] Add context to flannel errors

[manuelbuil]

Backport: #8284
Issue: #8416

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +4.15% 🎉

Comparison is base (bd04941) 47.33% compared to head (2969170) 51.49%.
Report is 2 commits behind head on release-1.27.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.27    #8419      +/-   ##
================================================
+ Coverage         47.33%   51.49%   +4.15%     
================================================
  Files               144      144              
  Lines             14637    14637              
================================================
+ Hits               6929     7537     +608     
+ Misses             6611     5900     -711     
- Partials           1097     1200     +103     

Flag	Coverage Δ
e2etests	48.96% <0.00%> (?)
inttests	44.48% <0.00%> (-0.18%)	⬇️
unittests	19.90% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
pkg/agent/flannel/flannel.go	43.03% <0.00%> (ø)

... and 42 files with indirect coverage changes

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