Move the functions * `BKE_pose_apply_action_selected_bones` * `BKE_pose_apply_action_all_bones` * and `BKE_pose_apply_action_blend` out of the blender kernel and into animrig. This will allow solving #126969 without having to include animrig code in the blender kernel. Pull Request: https://projects.blender.org/blender/blender/pulls/126978