JP-3444: update tso photometry to use ApertureStats

[jemorrison]

Resolves JP-3444

Closes #8019

This PR addresses when there are nans in the aperture for determining tso photometry. The resulting
ecsv file contained NaN values. This update uses the photutils function ApertureStats that screens
for Nan values.

Checklist for PR authors (skip items if you don't have permissions or they are not applicable)

• added entry in CHANGES.rst within the relevant release section

• updated or added relevant tests

• updated relevant documentation

• added relevant milestone

• added relevant label(s)

• ran regression tests, post a link to the Jenkins job below.
  How to run regression tests on a PR
  https://plwishmaster.stsci.edu:8081/job/RT/job/JWST-Developers-Pull-Requests/1620/

• All comments are resolved

• Make sure the JIRA ticket is resolved properly

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.36%. Comparing base (155408f) to head (54015b8).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #8672   +/-   ##
=======================================
  Coverage   60.36%   60.36%           
=======================================
  Files         372      372           
  Lines       38326    38326           
=======================================
  Hits        23137    23137           
  Misses      15189    15189           

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[emolter]

Looks fine to me so far. It's a bit hard to evaluate what this change does without some kind of diagnostic plot, e.g., a light curve before and after this PR (plus all of Melanie's changes to NaN handling)

[melanieclarke]

This looks good to me, other than 1 small typo in the change log. We should confirm that they definitely want to ignore NaNs in sources, before we merge, and I agree we should document the choice somwhere.

[melanieclarke]

We should confirm that they definitely want to ignore NaNs in sources, before we merge

Just following up - this is now confirmed, in the JP ticket.

[jemorrison]

@melanieclarke Could you look at the statement I put in the documentation. Does that sound ok ?

[melanieclarke]

A couple quick typos to fix, but otherwise, I think this is ready.