`measureIQ` for N&S is broken in 3.1.x

[KathleenLabrie]

Branch: release/3.1.x

measureIQ for N&S issues warning and cannot find any good sources. Used to work. Not urgent, I'm not holding 3.1 for this, but it should be looked at at some point.

================================================================================
RECIPE: measureIQ
================================================================================
   PRIMITIVE: measureIQ
   --------------------
      PRIMITIVE: tileArrays
      ---------------------
      WARNING - N20080112S0398_skyCorrected.fits has nothing to tile, as tile_all=False but each array has only one amplifier.
      .
/home/pipetest/testconda/susd3.9_20220816-test/lib/python3.9/site-packages/numpy/lib/function_base.py:4527: RuntimeWarning: invalid value encountered in subtract
  diff_b_a = subtract(b, a)
/home/pipetest/testconda/susd3.9_20220816-test/lib/python3.9/site-packages/numpy/lib/function_base.py:4527: RuntimeWarning: invalid value encountered in subtract
  diff_b_a = subtract(b, a)
/home/pipetest/testconda/susd3.9_20220816-test/lib/python3.9/site-packages/numpy/lib/function_base.py:4527: RuntimeWarning: invalid value encountered in subtract
  diff_b_a = subtract(b, a)
   WARNING - No good sources found in N20080112S0398_skyCorrected.fits
   .
	Wrote N20080112S0398_iqMeasured.fits in output directory

reduce completed successfully.

To reproduce: reduce -r measureIQ N20080112S0398_skyCorrected.fits

The file N20080112S0398_skyCorrected.fits can be found here: https://drive.google.com/drive/folders/1eJgTxJN0FwmW8zF-YTWztSuny7pmV2iu?usp=share_link

The input was produce with this recipe:

    p.prepare()
    p.addDQ()
    p.addVAR(read_noise=True)
    p.overscanCorrect()
    p.ADUToElectrons()
    p.addVAR(poisson_noise=True)
    p.findAcquisitionSlits()
    p.skyCorrectNodAndShuffle()