Core/Spells: Fixed implementation of SPELL_ATTR1_IMMUNITY_TO_HOSTILE_AND_FRIENDLY_EFFECTS and removed banish special cases that were neccessary because that attribute wasn't correctly supported

Port From (https://github.com/TrinityCore/TrinityCore/commit/c968dedfee59db53fc912ac166309f3d87470821)

Source/Framework/Constants/Spells/SpellConst.cs

@@ -1702,7 +1702,7 @@ namespace Framework.Constants
         ToggleFarSight = 0x2000, // Toggle Far Sight (Client Only)
         TrackTargetInChannel = 0x4000, // Track Target In Channel Description While Channeling, Adjust Facing To Face Target
         ImmunityPurgesEffect = 0x8000, // Immunity Purges Effect Description For Immunity Spells, Cancel All Auras That This Spell Would Make You Immune To When The Spell Is Applied
-        ImmunityToHostileAndFriendlyEffects = 0x10000, /*Wrong Impl*/ // Immunity To Hostile & Friendly Effects Description Will Not Pierce Divine Shield, Ice Block And Other Full Invulnerabilities
+        ImmunityToHostileAndFriendlyEffects = 0x10000, //  Immunity applied by this aura will also be checked for friendly spells (school immunity only) - used by Cyclone for example to cause friendly spells and healing over time to be immuned
         NoAutocastAi = 0x20000, // No Autocast (Ai)
         PreventsAnim = 0x40000, /*Nyi*/ // Prevents Anim Description Auras Apply UnitFlagPreventEmotesFromChatText
         ExcludeCaster = 0x80000, // Exclude Caster
@@ -2683,7 +2683,7 @@ namespace Framework.Constants
         Marked = 5,            // C  T| Nyi
         Wounded25Percent = 6,            //   T |
         Defensive2 = 7,            // Cc  | Nyi
-        Banished = 8,            //  C  | Nyi
+        Banished = 8,            //  C  |
         Dazed = 9,            //    T|
         Victorious = 10,           // C   |
         Rampage = 11,           //     | Nyi

Source/Framework/Constants/UnitConst.cs

@@ -474,7 +474,7 @@ namespace Framework.Constants
         Root = 0x400,
         Confused = 0x800,
         Distracted = 0x1000,
-        Isolated = 0x2000, // Area Auras Do Not Affect Other Players
+        Isolated_Deprecated = 0x2000, // REUSE
         AttackPlayer = 0x4000,
         Casting = 0x8000,
         Possessed = 0x10000, // being possessed by another unit
@@ -494,7 +494,7 @@ namespace Framework.Constants
 
         AllStateSupported = Died | MeleeAttacking | Charmed | Stunned | Roaming | Chase
                             | Focusing | Fleeing | InFlight | Follow | Root | Confused
-                            | Distracted | Isolated | AttackPlayer | Casting
+                            | Distracted | AttackPlayer | Casting
                             | Possessed | Charging | Jumping | Move | Rotating
                             | Evade | RoamingMove | ConfusedMove | FleeingMove
                             | ChaseMove | FollowMove | IgnorePathfinding | FollowFormationMove,