Update the data/lsst segmentation.txt gain and read noise values and focalplanelayout.txt geometry (x,y position, overscan,prescan), sensor names, to make them consistent with those in obs_lsst for lsst.obs.lsst.LsstCam ( eg. https://github.com/lsst/obs_lsst/blob/master/policy/lsstCam/R00.yaml ).
Currently, the values in data/lsst are consistent with PhosimMapper, but
DM-28556 creates a need to move to LsstCamMapper. To allow ISR, the calibration files (made with makeGainImages.py https://github.com/lsst-dm/phosim_utils/blob/master/bin.src/makeGainImages.py for images simulated for `LsstCam` instrument also need to use geometry and gain values consistent with LsstCam.