Core/Spells: prevent creatures to focus channeled spells without SPELL_ATTR1_CHANNEL_TRACK_TARGET

Port From (https://github.com/TrinityCore/TrinityCore/commit/d91e099b10a33d9205c023c81bcc966d713c39ab)

Source/Framework/Constants/Spells/SpellConst.cs

@@ -1411,6 +1411,7 @@ namespace Framework.Constants
         DemonHunter = 107
     }
 
+    [Flags]
     public enum TriggerCastFlags : uint
     {
         None = 0x0,   //! Not Triggered

Source/Game/Entities/Creature/Creature.cs

@@ -2882,6 +2882,10 @@ namespace Game.Entities
             if (_focusSpell != null)
                 return;
 
+            // some spells shouldn't track targets
+            if (focusSpell.IsFocusDisabled())
+                return;
+
             SpellInfo spellInfo = focusSpell.GetSpellInfo();
 
             // don't use spell focus for vehicle spells

Source/Game/Spells/Spell.cs

@@ -2543,7 +2543,7 @@ namespace Game.Spells
             // focus if not controlled creature
             if (m_caster.GetTypeId() == TypeId.Unit && !m_caster.HasUnitFlag(UnitFlags.PlayerControlled))
             {
-                if (!(m_spellInfo.IsNextMeleeSwingSpell() || IsAutoRepeat() || _triggeredCastFlags.HasAnyFlag(TriggerCastFlags.IgnoreSetFacing)))
+                if (!(m_spellInfo.IsNextMeleeSwingSpell() || IsAutoRepeat()))
                 {
                     if (m_targets.GetObjectTarget() && m_caster != m_targets.GetObjectTarget())
                         m_caster.ToCreature().FocusTarget(this, m_targets.GetObjectTarget());
@@ -7398,6 +7398,7 @@ namespace Game.Spells
         public bool IsTriggered() { return _triggeredCastFlags.HasAnyFlag(TriggerCastFlags.FullMask); }
         public bool IsTriggeredByAura(SpellInfo auraSpellInfo) { return (auraSpellInfo == m_triggeredByAuraSpell); }
         public bool IsIgnoringCooldowns() { return _triggeredCastFlags.HasAnyFlag(TriggerCastFlags.IgnoreSpellAndCategoryCD); }
+        public bool IsFocusDisabled() { return _triggeredCastFlags.HasFlag(TriggerCastFlags.IgnoreSetFacing) || (m_spellInfo.IsChanneled() && !m_spellInfo.HasAttribute(SpellAttr1.ChannelTrackTarget)); }
         public bool IsProcDisabled() { return _triggeredCastFlags.HasAnyFlag(TriggerCastFlags.DisallowProcEvents); }
         public bool IsChannelActive() { return m_caster.GetChannelSpellId() != 0; }