Annotate deprecated functions to allow linters to catch usage

[rbjorklin]

It would be useful to have linters assist in discovering use of deprecated api versions before they are eventually removed from client-go.

For example PDBs graduated to policy/v1 in k8s 1.21 and were eventually removed in k8s 1.25. Assuming I have linters configured correctly it would be helpful to get notified of these changes prior to the old version being removed or intentionally going looking for the information.

// Deprecated: use V1().PodDisruptionBudgets() instead. Since: v0.21.0