Add ContatinerAnnotations to the Runtime and config

Signed-off-by: Ed Bartosh <eduard.bartosh@intel.com>

docs/config.md

@@ -117,6 +117,11 @@ version = 2
       # * OCI: https://github.com/opencontainers/image-spec/blob/master/annotations.md
       pod_annotations = []
 
+      # container_annotations is a list of container annotations passed through to the OCI config of the containers.
+      # Container annotations in CRI are usually generated by other Kubernetes node components (i.e., not users).
+      # Currently, only device plugins populate the annotations.
+      container_annotations = []
+
       # privileged_without_host_devices allows overloading the default behaviour of passing host
       # devices through to privileged containers. This is useful when using a runtime where it does
       # not make sense to pass host devices to the container when privileged. Defaults to false -