Portions of source_catalog duplicate photutils.detection functionality

[stscijgbot-jp]

Issue JP-3866 was created on JIRA by Ned Molter:

The JWSTSourceCatalog object in source_catalog.source_catalog.py has quite a bit of code that appears to duplicate photutils.detection.daofinder.py (see https://github.com/astropy/photutils/blob/main/photutils/detection/daofinder.py ).](https://github.com/astropy/photutils/blob/main/photutils/detection/daofinder.py).)

It would be useful to consolidate these by making jwst inherit the relevant functions from photutils.  This would make it so we no longer need to maintain this in two places, and so that both repositories would benefit from any bug fixes or improvements.

In particular, the following function pairs appear to do the same thing (listed JWST first, photutils second):

• _daofind_cutout and cutout_data
• _daofind_cutout_conv and cutout_convdata
• roundness and roundness1
• sharpness and sharpness

There may be others.

It might also be possible to replace the _aper_local_background function with functionality from photutils.background, and rely on astropy more heavily for various flux conversions.