Fix engineImageLink not applying to weapon models

[TheCrazy17]

Summary

CClientIMG::LinkModel now restreams weapon models the same way it already does for vehicle models.

Motivation

Resolves #5145.

engineImageLinkDFF/engineImageLinkTXD link a new model through CClientIMG::LinkModel, which already restreams vehicle models so they pick up the new one. Weapon models were missing that call, so a weapon a ped was already holding kept its old RW clump and only picked up the replacement once something else happened to restream it. CClientDFF, CClientTXD and CClientGame already call CClientPedManager::RestreamWeapon for the same case, so CClientIMG now does the same.

Test plan

imgweapon.zip

With a ped already holding a M4, linking a replacement dff for model 356 now swaps the held weapon model.

Checklist

• Your code should follow the coding guidelines.
• Smaller pull requests are easier to review. If your pull request is beefy, your pull request should be reviewable commit by commit.

[Xenius97]

Wow, that was fast. Thanks!