lib: do not include bgpd headers in route_opaque.h

lib: do not include bgpd headers in route_opaque.h

Duplicate a couple of definitions in order to remove the bgpd
includes from this libfrr header. This is necessary to fix some
name collisions like PREFIX_LIST_IN being defined differently on
multiple daemons (as soon as other daemons start including
route_opaque.h).

Including daemon headers on libfrr headers is a bad practice and
should be avoided whenever possible.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>