Implement seamless driver upgrades

[nojnhuh]

kubernetes/kubernetes#129832 from Kubernetes 1.33 allows DRA kubelet plugins to perform rolling upgrades without any driver downtime. Docs added by that PR outline the necessary changes for drivers.

There is at least one extra assumption added by #104 that needs to be revisited when implementing seamless upgrades:

dra-example-driver/cmd/dra-example-kubeletplugin/health.go

Lines 66 to 67 in 103828c

	// TODO: this needs to adapt when seamless upgrades
	// are enabled and the filename includes a uid.

[alimaazamat]

/assign