[Scaling] Add support for zone ID and instance version to NPC Scaling (#2968)

* [Scaling] Add support for zone ID and instance version to NPC Scaling

# Notes
- Adds `zone_id` and `instance_version` to `npc_scale_global_base` table to allow for zone and version-specific scaling.
- Defaults back to `zone_id` of `0` and `instance_version` of `0` for global scaling.
- Scaling load precedence is as follows:
- `zone_id` of current zone and `instance_version` of current instance
- `zone_id` of current zone and `instance_version` of `0`
- `zone_id` of `0` and `instance_version` of `0`

* Remove debug comment.

* Use zone not NPC.

* SQL

utils/sql/db_update_manifest.txt

@@ -474,6 +474,7 @@
 9218|2023_01_24_item_recast.sql|show columns from character_item_recast like '%recast_type%'|contains|smallint
 9219|2023_01_29_merchant_status_requirements.sql|SHOW COLUMNS FROM merchantlist LIKE 'min_status'|empty|
 9220|2022_12_19_player_events_tables.sql|SHOW TABLES LIKE 'player_event_logs'|empty|
+9221|2023_02_24_npc_scaling_zone_id_instance_version|SHOW COLUMNS FROM `npc_scale_global_base` LIKE 'zone_id'|empty|
 
 # Upgrade conditions:
 # 	This won't be needed after this system is implemented, but it is used database that are not

utils/sql/git/required/2023_02_24_npc_scaling_zone_id_instance_version.sql

@@ -0,0 +1,5 @@
+ALTER TABLE `npc_scale_global_base`
+ADD COLUMN `zone_id` int(11) UNSIGNED NOT NULL DEFAULT 0 AFTER `level`,
+ADD COLUMN `instance_version` int(11) UNSIGNED NOT NULL DEFAULT 0 AFTER `zone_id`,
+DROP PRIMARY KEY,
+ADD PRIMARY KEY (`type`, `level`, `zone_id`, `instance_version`) USING BTREE;