Using bright time to perform vignetting and psf issue diagnosis

[fergusL]

As discussed in AstroHuntsman/huntsman-drp#209, it would be good to utilise variations between cameras to extract diagnostic information about the "health" of the array. As described in AstroHuntsman/huntsman-drp#209, there are a number of ways to do this. The measurements described will be easier to carry out in bright time as the sky background is brighter, so dome vignetting gradients are easier to detect.

The implementation of these measurements belongs in AstroHuntsman/huntsman-drp but eventually we will want to build in Dan's vignetting script as a kind of special calibration state that can run in bright time when no other targets are available