drivers: nxp_s32_canxl: add CANXL MRU handler

Add CANXL MRU handler, use the same RX, TX IRQ number.
Update the error priority that is lower priority than
the the tx_rx_mru priority incase the error interrupt
happens continuously, mru interrupt priority must be
higher to get report error counter. Otherwise the mru
interrupt can be delayed by error interrupt and
never call to MRU handler. This fixes #75022.

Signed-off-by: Cong Nguyen Huu <cong.nguyenhuu@nxp.com>