[release-1.31] Bump k3s, containerd, traefik, etcd, crictl

[brandond]

Proposed Changes

• Updates k3s: k3s-io/k3s@56ec5dd...39b54b9
• Update containerd to v2.0.2
• Update traefik to v2.11.20
• Update etcd to v3.5.18
• Update crictl to v1.31.1

Types of Changes

Version bumps

Verification

Check versions

Testing

Linked Issues

• [Release-1.31] - Bump component versions to sync with k3s #7747
• [Release-1.31] - rke2 ingress upgrade fails 1.31.4 -> 1.31.5 #7659
• [Release-1.31] - Windows Node cannot pull images from private registry #7751

User-Facing Change

* Update k3s to fix registry auth in containerd config template
* Update containerd to v2.0.2
* Update traefik to v2.11.20
* Update etcd to v3.5.18
* Update crictl to v1.31.1
* Update rke2-ingress-nginx chart to fix typo in default backend image template

Further Comments

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.98%. Comparing base (5eb2458) to head (4663230).

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.31    #7739      +/-   ##
================================================
+ Coverage         22.96%   22.98%   +0.02%     
================================================
  Files                34       34              
  Lines              3505     3506       +1     
================================================
+ Hits                805      806       +1     
  Misses             2652     2652              
  Partials             48       48              

Flag	Coverage Δ
inttests	8.75% <100.00%> (+0.02%)	⬆️
unittests	16.29% <0.00%> (-0.01%)	⬇️

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[VestigeJ]

lost permissions to approve but LGTM