[8923] Restructure gossip menus and make it possible to build selections by database

[newsbot]

<pre>m sql/mangos.sql
+ sql/updates/8923_01_mangos_gossip.sql
m sql/updates/Makefile.am
m src/game/Creature.cpp
m src/game/Creature.h
m src/game/GameObject.cpp
m src/game/GossipDef.cpp
m src/game/GossipDef.h
m src/game/Level3.cpp
m src/game/NPCHandler.cpp
m src/game/ObjectMgr.cpp
m src/game/ObjectMgr.h
m src/game/Player.cpp
m src/game/Player.h
m src/game/QuestHandler.cpp
m src/game/World.cpp
m src/shared/Database/SQLStorage.cpp
m src/shared/revision_nr.h
m src/shared/revision_sql.h

[8923] Restructure gossip menus and make it possible to build selections by database

As result, gossip for GO is now possible. Moved related data structures and remove useless from code.
Please note that after some time, table npc_gossip will be fully removed (use menuId in _template in relation to gossip_menu as replacement).
Special thanks to GriffonHeart for help with research, discussions and ideas of code and thanks to Vladimir for helpful input.

Signed-off-by: NoFantasy <nofantasy@nf.no></pre>



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