[Wan 2.2 Animate] WanAnimateToVideo: Add parameters for pose and face animation strength

### Feature Idea

As the influence of facial animation is often (too) strong it would make sense to have control over it. Therefore I'm asking to implement parameters for pose and face strength.

### Existing Solutions

This is already implemented in kijais wrapper. Mentions of "face_strength" and "pose_strength" can be found here:
https://github.com/kijai/ComfyUI-WanVideoWrapper/blob/main/wanvideo/modules/model.py

Though I honestly can't retrieve where exactly this happens - else I would offer a fix myself :)

### Other

_No response_

Start with the referenced wanvideo/modules/model.py in kijai's ComfyUI-WanVideoWrapper and inspect how face_strength and pose_strength are used. Then locate the WanAnimateToVideo implementation in ComfyUI and determine where corresponding parameters would enter the node; done means both strengths are exposed and affect animation influence as requested.

Written by the indexing model from the issue text.