Confetti in cleaning

[keflavich]

"Confetti" problems occur when adjacent channels switch between having and not having model components (e.g., we saw this in ALMA-IMF: https://github.com/ALMA-IMF/notebooks/blob/master/ConfettiQA.ipynb)

We have a few instances of this happening in ACES now too, at a lower level:
#145 (comment)

Be wary of these features: they can appear as fake spectral peaks.

[ashleythomasbarnes]

Issues with fixes (tbd):

#191
#138

[djeff1887]

• Execution Block ID uid://A001/X15b4/X43 Sgr_A_st_m_03_7M_updated #110