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)

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

• [ ] updated or added relevant tests

• [x] updated relevant documentation

• [x] added relevant milestone

• [x] added relevant label(s)

• [x] 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/

• [x] All comments are resolved

• [ ] Make sure the JIRA ticket is resolved properly

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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

Additional details and impacted files

```diff @@ 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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[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 ?