Migrate kubernetes subprojects off of deprecated flags

[BenTheElder]

There are a number of places that kubernetes subprojects are still using --kube-root or --loglevel with kind:

https://cs.k8s.io/?q=--kube-root&i=nope&files=&excludeFiles=&repos=

These flags are deprecated and we should migrate the usage.

For --kube-root, the value should be the first non-flag argument to kind build node-image instead.

For --loglevel, an appropriate verbosity should be set instead with -v

https://github.com/kubernetes-sigs/kind/pull/3716/files#diff-2740c7f56a6f791e3b58762614a3e84f6225b1df7531b792bebb1bb45f4b6b41L98-L101

/kind cleanup
/sig testing

[BenTheElder]

kubernetes/test-infra#33331