[Objects] Add fix_z column to ground spawns (#3992)

* [Objects] Add is_floating column to objects/ground spawns

# Notes
- Allows ground spawns/objects to float without having `FixZ()` called.

* Remove from object.

* Database version

* Fix

* Change to fix_z

common/eq_packet_structs.h

@@ -3451,18 +3451,21 @@ struct Make_Pet_Struct { //Simple struct for getting pet info
 	uint32 min_dmg;
 	uint32 max_dmg;
 };
-struct GroundSpawn{
-	float max_x;
-	float max_y;
-	float min_x;
-	float min_y;
-	float max_z;
-	float heading;
-	char name[20];
-	uint32 item;
-	uint32 max_allowed;
-	uint32 respawntimer;
+
+struct GroundSpawn {
+	float       max_x         = 0.0f;
+	float       max_y         = 0.0f;
+	float       min_x         = 0.0f;
+	float       min_y         = 0.0f;
+	float       max_z         = 0.0f;
+	float       heading       = 0.0f;
+	std::string name          = std::string();
+	uint32      item_id       = 0;
+	uint32      max_allowed   = 1;
+	uint32      respawn_timer = 1;
+	bool        fix_z         = true;
 };
+
 struct GroundSpawns {
 	struct GroundSpawn spawn[50]; //Assigned max number to allow
 };