accel/ivpu: Move recovery work to system_unbound_wq

Recovery work doesn't need to be bound to any specific CPU, so move it
to unbound workqueue to improve execution time and system latency.

Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Signed-off-by: Karol Wachowski <karol.wachowski@intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250129125636.1047413-7-jacek.lawrynowicz@linux.intel.com