Fix Pedestrians colision/DeathAnim Gen3

[Madecu]

Gen3 pedestrians have no DeathAnim yet, first we must modify the BP_walker, so that it can pick different animation sets depending on it's generation

[DnDare]

We'd try to retarget GEN2 DeathAnimations to GEN3 skeletal definition, UE5 retargeting tools have evolved since UE4.
*Whisfull thinking, Maybe, just retargeting would be enough, without modifying BP_Walker. We have to research