Core/Misc: Remove obsolete C++11 backward compatibility macros

OVERRIDE, FINAL, DELETE_MEMBER
DB/Gossip: Fix "Alchemist Pestlezugg <Alchemy Supplies>" gossip
Closes #11958
Merge pull request #11950 from Dehravor/override-final-delete

Core/Misc: Remove obsolete C++11 backward compatibility macros
DB/Loot: Fix drops of Fragment of Val'anyr

By dr-j, closes #11959.
DB/Seasonal:
* Added missing seasonal quest in game_event_seasonal_questrelation table
* Remove all event = 0 in character_queststatus_seasonal table
DB/Misc: Fix some incorrect triggers

By dr-j, closes #11963
DB/Creature: Fix even more creature templates
DB/Creature: Fix even more creature templates
DB/Creature: Fix even more creature templates
DB/Creature: Fix even more creature templates
DB/Creature: Fix even more creature templates
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore

Conflicts fixed:
	src/server/scripts/EasternKingdoms/ScarletMonastery/boss_headless_horseman.cpp
	src/server/scripts/EasternKingdoms/ShadowfangKeep/instance_shadowfang_keep.cpp
	src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/boss_infinite_corruptor.cpp
	src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/instance_culling_of_stratholme.cpp
	src/server/scripts/Northrend/AzjolNerub/AzjolNerub/boss_hadronox.cpp
	src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/instance_trial_of_the_crusader.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_deathbringer_saurfang.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_festergut.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_lady_deathwhisper.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_rotface.cpp
	src/server/scripts/Northrend/IcecrownCitadel/boss_sindragosa.cpp
	src/server/scripts/Northrend/Naxxramas/boss_gluth.cpp
	src/server/scripts/Northrend/Naxxramas/boss_thaddius.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/boss_auriaya.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/boss_flame_leviathan.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/boss_freya.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/boss_hodir.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/boss_kologarn.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/instance_ulduar.cpp
	src/server/scripts/Outland/zone_hellfire_peninsula.cpp
	src/server/scripts/World/go_scripts.cpp