[9894] Move GetCastingTimeForBonus and some other code to GetSpellCastTimeForBonus.

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m src/game/SpellMgr.cpp

m src/game/SpellMgr.h

m src/game/Unit.cpp

m src/game/Unit.h

m src/shared/revision_nr.h



[9894] Move GetCastingTimeForBonus and some other code to 

GetSpellCastTimeForBonus.



Important changes:



* Chaged way caluclation "-5% of total per any additional effect" to percent

  apply instead use raw value that correct only for 3500 cast time spells.

* GetSpellCastTimeForBonus result now alwasy not applied to creature casted 

spells

  Before it not applied only to instant spells. Please test if this ok in all 

  cases.

* Leech effect modify spell casting time move into GetCastingTimeForBonus and 

then called

  also for melee spells. But only creature spells exist with melee class damage 

  and its

  not affected by GetCastingTimeForBonus anyway now.



Signed-off-by: VladimirMangos 

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