[c2955] Add script support for quest 10988

Thanks @grz3s for providing the necessary data

Please note that the spawns locations and durations for creature entry 22986 and go entry 185541 need to be synced

(based on commit SD2-WotLK [2955] - c364af1)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>