Core/Battleground: Small code optimization
DB/Spells: Fix Rune Strike

Closes #6514
Core/Spells: Fix Rogue T10 4P bonus
Closes #4153
Core/SAI: Additions to d0bde02b21241773c908c18ad

Signed-off-by: Nay <dnpd.dd@gmail.com>
Core/Vehicle: Fix spell focus check for vehicle caster
Fix non-pch compile