*/*: fully move at user/group to at package
The at
user and group has been created by both the alpine-baselayout
and at
package. Since it is only used by the at
package it makes more sense to create it there.
Part of #15453
The at
user and group has been created by both the alpine-baselayout
and at
package. Since it is only used by the at
package it makes more sense to create it there.
Part of #15453