Derive SIRS kernel coefficients for NIRSpec, NIRISS, and NIRCam longwave detectors

[stscijgbot-jp]

Issue JP-3832 was created on JIRA by David Law:

JP-3622 recently implemented SIRS reference pixel subtraction as an option for NIRCam, noticeably reducing 1/f noise in a generic manner for all observations that include reference pixels.  This ticket is to derive the necessary coefficients for the NIRSpec and NIRISS detectors as well, which may be able to similarly benefit from this technique.

Note that nrcalong and nrcblong also need to be derived and added to the existing NIRCam reference file, which currently contains information only for the shortwave detectors.