### Godot version

4.2 RC2

### System information

Any

### Issue description

https://github.com/godotengine/godot/assets/61938263/42ed582f-7b87-424c-8d19-ba0650ead5aa

It should not be reset by pausing.

### Steps to reproduce

Pause AnimationPlaybackTrack

### Minimal reproduction project

N/A
Variant res;
	if (GDVIRTUAL_CALL(_post_process_key_value, p_anim, p_track, p_value, const_cast<Object *>(p_object), p_object_idx, res)) {
		return res;
	}
	return _post_process_key_value(p_anim, p_track, p_value, p_object, p_object_idx);
}
Variant AnimationMixer::_post_process_key_value(const Ref<Animation> &p_anim, int p_track, Variant p_value, const Object *p_object, int p_object_idx) {
	switch (p_anim->track_get_type(p_track)) {
#ifndef _3D_DISABLED
		case Animation::TYPE_POSITION_3D: {
			if (p_object_idx >= 0) {
				const Skeleton3D *skel = Object::cast_to<Skeleton3D>(p_object);
				return Vector3(p_value) * skel->get_motion_scale();
			}
			return p_value;
		} break;
#endif 
		default: {
		} break;
	}
	return p_value;
}
void AnimationMixer::_blend_init() {