[Multiple] Arena/Rated Bg Deserter

[Amnezx]

WoW Freakz spell link: -
Bug description: Deserter should apply as following when leaving an arena match/not entering in arena.
Proof: Deserter debuff now lasts 5 minutes (down from 20 minutes). New applications of the Deserter debuff within a 20-minute rolling window extends its duration by 5 additional minutes each time, up to a maximum of 20 minutes.
The Deserter debuff is applied under the following conditions:
Arena or Rated Battlegrounds: Leaving the queue, ignoring the prompt to enter when the match is ready, or leaving the match before anyone has entered combat.
Battlegrounds: Leaving before the match is over.
https://worldofwarcraft.com/en-us/news/14216440/5-4-8-hotfixes-july-22