Adjust "diagnostic" code start bucket

[slactjohnson]

The 100Hz/5Hz diagnostic codes we've set up currently line up with the goose trigger on some, if not all, of the "on-time" laser shots. This is not super helpful. We should adjust the timing pattern such that this doesn't happen. The diagnostic codes should be shifted by one 32.5 kHz pulse, in addition to any SC bucket offset.

I've sketched this out here: https://confluence.slac.stanford.edu/display/L2SI/Trigger+Alignment