[7645] Fixed problems wit temporary unsummoned pets and cleanup code.
* Save temporary unsummoned pet to current slot (instead non_in_slot mode) and
prevent save as current pet summoned while temporay unsummon (arena)
* Prevent overwrite temporary summoned pet data
* At player loading set temporary unsummoned pet data instead pet loading
if pet expected to be temporary unsummoned in current player state (loading in taxi flight/etc)
* Restore proper pet at arena leave and unsummon in arena summoned.