Zul Farrak grave spawns "Zul'Farrak Zombie" NPC overtuned

### What client do you play on?

enUS

### Faction

- [X] Alliance
- [X] Horde

### Content Phase:

- [X] Generic
- [ ] 1-19
- [ ] 20-29
- [ ] 30-39
- [X] 40-49
- [ ] 50-59
- [ ] 60

### Current Behaviour
NPC-Id: 7286

Openning Graves in Zul'Farrak spawns [Zul'Farrak Zombie NPC](https://tbc.wowhead.com/npc=7286/zulfarrak-zombie#comments) that on research hit for 600-650 physical damage to the target with no armor, and around 350 to 40-45 level geared tanks with around 45% reduced physical damage, making it challenging for the group to take them down if more than one is spawned.
The data seems to be taken from a private server database:

[Video of a fully blue dungeon geared druid taking some significant damage.](https://streamable.com/8j1co1)

[Video of regular elite NPC's physical damage in Zul'Farrak.](https://streamable.com/i5f83i)

Logs of hits on a lvl 60 shaman with 45% reduced physical damage taken:
### Expected Blizzlike Behaviour

The mobs seem to be hitting significantly lower from the footage on WoW classic videos and comments on WoWHead, hitting no harder than regular elite mobs that can be found in the instance (around 200 physical damage to targets with no armor) making the mobs overtuned to around 66%

### Source
[Found a classic video documenting Zombies hit a level 44 druid tank for approximately 100 damage on WoW Classic.](https://youtu.be/29DRx__itnk?t=3569)

WoWHead comment from 2008 stating mobs don't hit for more than regular normal mob elites:

[Zul'Farrak zombie hitting a cloth user for around 300 damage.](https://youtu.be/N4bmJyu_qs0?t=20)

### Steps to reproduce the problem
1. Enter Zul'Farrak
2. Go to the Grave zone to dig graves and summon Zul'Farrak Zombie (NPC-Id: 7286)
3. See mobs hit for significant amount of damage even plate geared level 60's.

### Extra Notes
Originally reported: https://github.com/chromiecraft/chromiecraft/issues/3469
### AC rev. hash/commit

https://github.com/chromiecraft/azerothcore-wotlk/commit/283ce18bb7b961264eae983a401aaacb89725273

### Operating system

Windows 10.

### Modules

- [mod-ah-bot](https://github.com/azerothcore/mod-ah-bot)
- [mod-cfbg](https://github.com/azerothcore/mod-cfbg)
- [mod-chat-transmitter](https://github.com/azerothcore/mod-chat-transmitter)
- [mod-chromie-xp](https://github.com/azerothcore/mod-chromie-xp)
- [mod-desertion-warnings](https://github.com/azerothcore/mod-desertion-warnings)
- [mod-duel-reset](https://github.com/azerothcore/mod-duel-reset)
- [mod-eluna-lua-engine](https://github.com/azerothcore/mod-eluna-lua-engine)
- [mod-ip-tracker](https://github.com/azerothcore/mod-ip-tracker)
- [mod-low-level-arena](https://github.com/azerothcore/mod-low-level-arena)
- [mod-multi-client-check](https://github.com/azerothcore/mod-multi-client-check)
- [mod-pvp-titles](https://github.com/azerothcore/mod-pvp-titles)
- [mod-pvpstats-announcer](https://github.com/azerothcore/mod-pvpstats-announcer)
- [mod-queue-list-cache](https://github.com/azerothcore/mod-queue-list-cache)
- [mod-server-auto-shutdown](https://github.com/azerothcore/mod-server-auto-shutdown)
- [mod-save-inventory](https://github.com/Nyeriah/mod-save-inventory)
- [lua-carbon-copy](https://github.com/55Honey/Acore_CarbonCopy)
- [lua-exchange-npc](https://github.com/55Honey/Acore_ExchangeNpc)
- [lua-custom-worldboss](https://github.com/55Honey/Acore_CustomWorldboss)
- [lua-level-up-reward](https://github.com/55Honey/Acore_LevelUpReward)
- [lua-recruit-a-friend](https://github.com/55Honey/Acore_RecruitAFriend)
- [lua-send-and-bind](https://github.com/55Honey/Acore_SendAndBind)
- [lua-temp-announcements](https://github.com/55Honey/Acore_TempAnnouncements)
- [lua-zonecheck](https://github.com/55Honey/acore_Zonecheck)
- [lua-zone-debuff](https://github.com/55Honey/Acore_ZoneDebuff)

### Customizations

None

### Server

ChromieCraft

Reproduce the issue in Zul'Farrak by opening graves and observing NPC-Id 7286, Zul'Farrak Zombie. Compare its physical damage with regular elite mobs using the provided videos and logs; done means the zombie no longer deals the reported overtuned damage to similarly geared characters.

Written by the indexing model from the issue text.