[Release-1.22] Update to the newest flannel

[manuelbuil]

Backport: #4258
Issue: #4259

[codecov-commenter]

Codecov Report

Merging #4265 (7ede7d2) into release-1.22 (971854c) will increase coverage by 0.35%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           release-1.22    #4265      +/-   ##
================================================
+ Coverage         11.38%   11.73%   +0.35%     
================================================
  Files               135      135              
  Lines              9129     9129              
================================================
+ Hits               1039     1071      +32     
+ Misses             7872     7830      -42     
- Partials            218      228      +10     

Flag	Coverage Δ
inttests	0.67% <ø> (?)
unittests	11.38% <ø> (ø)

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Impacted Files	Coverage Δ
pkg/flock/flock_unix.go	20.00% <0.00%> (+20.00%)	⬆️
tests/util/cmd.go	42.02% <0.00%> (+42.02%)	⬆️

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