- Bump to version 24

- Drop %tmpfiles_create_package
It can't work during transactional updates because the paths that
systemd-tmpfiles usually operates on (such as /var) can't be changed. It
appears that the only user of this macro doesn't really need this macro so
let's drop it.

- Drop %sysusers_create_inline
It's deprecated and the only user of this macro is being converted to
%sysusers_create_package. So drop it now before the deprecated macro attracts
more users.

- Unlike systemd-tmpfiles call in %tmpfiles_create_package(), systemd-sysusers
must always be called by %sysusers_create_package() even on transactional
systems since it's part of the macro contract. Writing to /etc is not
recommended on such systems but it has to work anyways.