Add example for device taints and tolerations (KEP-5055)

[willie-yao]

KEP-5055 (kubernetes/enhancements#5055) adds support for tainting devices to prevent using them for new pods and/or cause pods using them to stop. Users can decide to tolerate taints. This was Alpha in 1.33 and reached Beta in 1.36.

The example driver should demonstrate how a driver can set taints on devices (e.g. to mark a device as unhealthy or reserved) and how users can specify tolerations in their ResourceClaims.

[nojnhuh]

Upstream docs: https://kubernetes.io/docs/concepts/scheduling-eviction/dynamic-resource-allocation/#device-taints-and-tolerations

We can maybe sufficiently demonstrate this with DeviceTaintRule resources in a new example vs. exposing some interface to add taints to the devices in ResourceSlices.