[10781] Use BattleGround(AV)TeamIndex enum types in AV battleground code.

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автор: VladimirMangos

m src/game/BattleGround.cpp

m src/game/BattleGround.h

m src/game/BattleGroundAB.cpp

m src/game/BattleGroundAV.cpp

m src/game/BattleGroundAV.h

m src/game/BattleGroundEY.cpp

m src/shared/revision_nr.h

[10781] Use BattleGround(AV)TeamIndex enum types in AV battleground code.



* Added BattleGroundAVTeamIndex enum type for 3-case special team list fo AV.

* Rename BattleGroundTeamId -> BattleGroundTeamIndex for clarify

* Some safe checks added and dropped bogus call RewardReputationToTeam in BattleGroundAV::HandleQuestComplete

  for BattleGroundTeamIndex as faction. Unclear for what it expected used so dropped.

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