bone wraith stun duration

https://github.com/chromiecraft/chromiecraft/issues/4036
### What client do you play on?

enUS

### Faction

Horde

### Content Phase:

60

### Current Behaviour

while wearing a costume example in dungeons, when being stunned and seeing stun wear off, you still cant move for like 5s.

https://user-images.githubusercontent.com/11332559/198340820-247ca907-43c5-45af-91f4-fb48759d80cf.mp4
(i was mashing the arrow keys after knockdown finished)

### Expected Blizzlike Behaviour

id expect to run free after stun wears off.

### Source

custom module

### Steps to reproduce the problem

.additem 200127
.npc add temp 10814
have [Knockdown](https://wowgaming.altervista.org/aowow/?spell=16790) cast on you

get stunned by possibly by mobs in dungeons and try to move after stun wears off but you cant.

### Extra Notes

Unable to reproduce with murloc, succubus, or algalon costumes

### AC rev. hash/commit

https://github.com/chromiecraft/azerothcore-wotlk/commit/ce27bbbc86b73279c771a819073c2a5f96487519

### Operating system

Ubuntu 20.04

### Modules

- [mod-ah-bot](https://github.com/azerothcore/mod-ah-bot)
- [mod-bg-item-reward](https://github.com/azerothcore/mod-bg-item-reward)
- [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-cta-switch](https://github.com/azerothcore/mod-cta-switch)
- [mod-desertion-warnings](https://github.com/azerothcore/mod-desertion-warnings)
- [mod-dmf-switch](https://github.com/azerothcore/mod-dmf-switch)
- [mod-duel-reset](https://github.com/azerothcore/mod-duel-reset)
- [mod-eluna](https://github.com/azerothcore/mod-eluna)
- [mod-ip-tracker](https://github.com/azerothcore/mod-ip-tracker)
- [mod-low-level-arena](https://github.com/azerothcore/mod-low-level-arena)
- [mod-low-level-rbg](https://github.com/azerothcore/mod-low-level-rbg)
- [mod-multi-client-check](https://github.com/azerothcore/mod-multi-client-check)
- [mod-progression-system](https://github.com/azerothcore/mod-progression-system)
- [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-rdf-expansion](https://github.com/azerothcore/mod-rdf-expansion)
- [mod-transmog](https://github.com/azerothcore/mod-transmog)
- [mod-weekend-xp](https://github.com/azerothcore/mod-weekend-xp)
- [mod-instanced-worldbosses](https://github.com/nyeriah/mod-instanced-worldbosses)
- [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

Start by reproducing the Bone Wraith costume case with `.additem 200127`, `.npc add temp 10814`, and Knockdown (spell 16790), then compare it with the costumes that could not reproduce the issue. Trace the costume and stun behavior in the module; done means movement is possible immediately after the stun visibly ends, while preserving normal behavior for other costumes.

Written by the indexing model from the issue text.