[rtl,otp_ctrl] Report lc_gate fsm error as fatal_prim_otp_alert

### Description

The otp_macro rtl instantiates a tlul_lc_gate module, which has a redundantly encoded fsm.
An incorrect fsm state error is flagged as fatal_bus_integ_error (alert[2]) rather than fatal_prim_otp_alert (alert[3]). I find this strange, but perhaps there are good reasons for it.