Scripts/Ulduar: Fix Ignis' Slag Pot periodic ticks and enable achievement "Hot Pocket"
DB/Disables: Remove criteria for the "Shattered" achievement from disables

...as it works fine. Ulduar/Ignis achievement.
SQL: Update /dev/world_database.sql
DB/Achievement: Remove unneeded criteria data for "A Tribute to Immortality"

Required team is already checked from dbc on criteria update
Closes #4622
Thanks to @joschiwald

(cherry picked from commit 1823e2f9b822b163a7f79719e6c8d1504707292e)
DB/Quest: New Recruit

Fix New Recruit http://www.wowhead.com/quest=13143
Scripts/ToC: Twin Val'kyr

- Script rewritten to EventMaps
- Implemented random special ability sequence
- Adjusted timer for special abilities to 45 seconds
- Misc clean up.
Closes #7546
DB/Quest: The Vile Hold

Script Eye of Dominion / Lithestalker for http://www.wowhead.com/quest=13145
Scripts/ToC: Misc forgotten clean ups
DB/Quest: A Undead's Best Friend / Eidolan Watcher

Fix http://www.wowhead.com/quest=13169/an-undeads-best-friend and other quests using this vehicle 

Only major bug as with the lithe stalker is when player exits vehicle player should get teleported back to position where they mounted vehicle as if it was pocessed but this is vehicle
Scripts/ToC: Few codestyle changes and clean ups
DB/Misc: Lithe Stalker Quests

Fix: -

http://www.wowhead.com/quest=13146 Generosity Abounds
http://www.wowhead.com/quest=13147 Matchmaker
http://www.wowhead.com/quest=13160 Stunning View

Closes https://github.com/TrinityCore/TrinityCore/issues/11855
Closes https://github.com/TrinityCore/TrinityCore/issues/13487
DB/Misc: Eye of Dominion gossip conditions
Scripts/ToC: Remove a safe-measure call that caused issues

Closes #11874
DB/Misc: Put right fieldnae in delete clause which was causing error on apply
Scripts/CoS: removed SetDespawnAtFar, fixed situation when Artas attacked some NPC and disappeared because he was out of range of players

With these lines it's almost impossible to finish properly this dungeon. For example when Arthas moves ahead to attack NPC and then returns back, when this happens, Arthas is despawned.