Reduce the OptoHybrid temperature limits

For operations at p5, the default temperature limits have been reduced as follow:

• Over-temperature trigger (triggers the automatic power off) - 65°C
• Over-temperature reset (restarts the FPGA) - 55°C
• Temperature-sensore alarm trigger - 55°C
• Temperature-sensore alarm reset - 55°C

Additionally, ensure that the slow-control counters are only incremented when the alarm is raised, not for every clock cycle (i.e. added a oneshot).