Calculation of ephemral storage of node is incorrect when /var/lib/containers is mounted separately

Issue

• In day-2 task, if /var/lib/containers is mounted separately on different device by using machineConfig Referencing KCS then node object is not reflecting the additional amount of storage at Capacity.ephemeral-storage and Allocatable.ephemeral-storage.
• In case of /var/lib/containers is mounted on different device keeping root filesystem (which will include /var/lib/kubelet) separately, to avoid filling /var/lib/containers as well as /var/lib/kubelet, ResourceQuota applied at project level is not respecting the increase in size at /var/lib/containers and only evicting the pod if the limit for ephemeral-storage is crossed in /var/lib/kubelet.