Update flannel and base cni plugins version

[rbrtbnfgl]

Proposed Changes

• Update Flannel version to v0.25.7
• Update CNI plugins to 1.6.0

Types of Changes

Verification

Testing

Linked Issues

• Update Flannel and CNI plugins version #11183

User-Facing Change

Further Comments

[manuelbuil]

There is already flannel v0.26.0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.22%. Comparing base (0438011) to head (e621c76).
Report is 13 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11188      +/-   ##
==========================================
- Coverage   46.94%   42.22%   -4.72%     
==========================================
  Files         178      178              
  Lines       18498    18498              
==========================================
- Hits         8683     7810     -873     
- Misses       8463     9480    +1017     
+ Partials     1352     1208     -144     

Flag	Coverage Δ
e2etests	34.38% <ø> (-7.84%)	⬇️
inttests	34.57% <ø> (-0.03%)	⬇️
unittests	13.11% <ø> (ø)

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[thomasferrandiz]

There is already flannel v0.26.0

yes but it requires go 1.23, and k3s is on 1.22

[brandond]

yes but it requires go 1.23, and k3s is on 1.22

Is that something you have control over? I don't think we will be able to use go 1.23 until Kubernetes 1.32.