investigate cgroup v2 is used by all container runtimes

[medyagh]

some integration test failures on Prow hint me that maybe we are not optimized for cgroup v2 (maybe different than jenkins)

in one minikube test log I see warrnings like
https://storage.googleapis.com/minikube-builds/logs/22301/42940/Docker_Linux.html#fail_TestFunctionalNewestKubernetes%2fVersionv1.35.0-rc.1%2fparallel%2fDockerEnv%2fbash

ControlAvailable:false Error: RemoteManagers:<nil>} LiveRestoreEnabled:false Isolation: InitBinary:docker-init ContainerdCommit:{ID:dea7da592f5d1d2b7755e3a161be07f43fad8f75 Expected:} RuncCommit:{ID:v1.3.4-0-gd6d73eb8 Expected:} InitCommit:{ID:de40ad0 Expected:} SecurityOptions:[name=apparmor name=seccomp,profile=builtin] ProductLicense: Warnings:[WARNING: Support for cgroup v1 is deprecated and planned to be removed


	==> Docker <==

	Dec 22 22:57:39 functional-384766 dockerd[17979]: time="2025-12-22T22:57:39.427378701Z" level=info msg="Docker daemon" commit=fbf3ed2 containerd-snapshotter=false storage-driver=overlay2 version=29.1.3

related
moby/moby#51111

[p172913]

/assign