drm: amdgpu: Use struct drm_wedge_task_info inside of struct amdgpu_task_info

drm: amdgpu: Use struct drm_wedge_task_info inside of struct amdgpu_task_info

To avoid a cast when calling drm_dev_wedged_event(), replace pid and
task name inside of struct amdgpu_task_info with struct
drm_wedge_task_info.

Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250617124949.2151549-6-andrealmeid@igalia.com
Signed-off-by: André Almeida <andrealmeid@igalia.com>