Handling LLRF EVE for 2 systems in Orbit Interlock

[murilobalves]

          I think this PR is missing handling the LLRF EVE stuff from this block, since we now have two EVEs

        # # RF EVE
        trgsrc = _HLTimeSearch.get_ll_trigger_names('SI-Glob:TI-LLRF-PsMtm')
        pvname = _LLTimeSearch.get_channel_output_port_pvname(trgsrc[0])
        self._llrf_evtcnt_pvname = f'{pvname.propty}EvtCnt-Mon'
        self._everf_dev = _Device(
            pvname.device_name,
            props2init=[self._llrf_evtcnt_pvname, ],
            auto_monitor_mon=True)
        pvo = self._everf_dev.pv_object(self._llrf_evtcnt_pvname)
        pvo.wait_for_connection()
        self._everf_evtcnt = pvo.get() or 0

and

        # verify if RF EVE counted the event PsMtm
        new_evtcnt = self._everf_dev[self._llrf_evtcnt_pvname]
        if new_evtcnt == self._everf_evtcnt:
            self._update_log('WARN:RF EVE did not count event PsMtm')
        self._everf_evtcnt = new_evtcnt

Originally posted by @ericonr in #1109 (review)