device/device/utils/unix: Updates all device major/minor parsing to use uin32
device/device/utils/unix: Updates all device major/minor parsing to use uin32

Also moves away from shared.Major/Minor functions to unix package.

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

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