Add nodev Option to /var/tmp

Description

The nodev mount option can be used to prevent device files from being created in /var/tmp. Legitimate character and block devices should not exist within temporary directories like /var/tmp. Add the nodev option to the list of Options in the systemd.mount unit that controls mounting of /var/tmp.

Rationale

The only legitimate location for device files is the /dev directory located on the root partition. The only exception to this is chroot jails.