Add FAQ entry about too many open files errors when using a container-based driver

[EmmanuelKasper]

This is based on https://kind.sigs.k8s.io/docs/user/known-issues/#pod-errors-due-to-too-many-open-files and was also mentioned in https://00formicapunk00.wordpress.com/2024/12/10/too-many-open-files-in-minikube-pod/

The problem will pop up on HA setups using a container driver. I had this with Docker, but probably Podman will hit the same limit, as this is a Linux kernel limit independant of the container runtime.

[linux-foundation-easycla]

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