Core/PacketIO: Drop correct field in SMSG_PARTY_UPDATE and utilize new bit properly

Port From (https://github.com/TrinityCore/TrinityCore/commit/6d86c670dda434c7956164b1ca4490b93f8d862f)

Source/Game/Groups/Group.cs

@@ -1479,12 +1479,11 @@ namespace Game.Groups
 
                 playerInfos.GUID = member.guid;
                 playerInfos.Name = member.name;
+                playerInfos.Class = member._class;
 
                 playerInfos.FactionGroup = Player.GetFactionGroupForRace(member.race);
 
-                playerInfos.Status = GroupMemberOnlineStatus.Offline;
-                if (memberPlayer && memberPlayer.GetSession() && !memberPlayer.GetSession().PlayerLogout())
-                    playerInfos.Status = GroupMemberOnlineStatus.Online | (IsBGGroup() || IsBFGroup() ? GroupMemberOnlineStatus.PVP : 0);
+                playerInfos.Connected = memberPlayer?.GetSession() != null && !memberPlayer.GetSession().PlayerLogout();
 
                 playerInfos.Subgroup = member.group;         // groupid
                 playerInfos.Flags = (byte)member.flags;            // See enum GroupMemberFlags

Source/Game/Networking/Packets/PartyPackets.cs

@@ -1072,7 +1072,7 @@ namespace Game.Networking.Packets
         public DungeonScoreSummary DungeonScore = new();
     }
 
-    class PartyPlayerInfo
+    struct PartyPlayerInfo
     {
         public void Write(WorldPacket data)
         {
@@ -1082,10 +1082,10 @@ namespace Game.Networking.Packets
             data.WriteBit(VoiceChatSilenced);
             data.WriteBit(FromSocialQueue);
             data.WritePackedGuid(GUID);
-            data.WriteUInt8((byte)Status);
             data.WriteUInt8(Subgroup);
             data.WriteUInt8(Flags);
             data.WriteUInt8(RolesAssigned);
+            data.WriteUInt8(Class);
             data.WriteUInt8(FactionGroup);
             data.WriteString(Name);
             if (!VoiceStateID.IsEmpty())
@@ -1095,14 +1095,14 @@ namespace Game.Networking.Packets
         public ObjectGuid GUID;
         public string Name;
         public string VoiceStateID;   // same as bgs.protocol.club.v1.MemberVoiceState.id
-        public GroupMemberOnlineStatus Status;
+        public byte Class;
         public byte Subgroup;
         public byte Flags;
         public byte RolesAssigned;
         public byte FactionGroup;
         public bool FromSocialQueue;
         public bool VoiceChatSilenced;
-        public bool Connected = true;
+        public bool Connected;
     }
 
     struct PartyLFGInfo