Documentation for ModelContainer and custom attributes in ASN related to group_id, tweakreg_catalog, is missing.

[mcara]

https://jwst-pipeline.readthedocs.io/en/stable/api/jwst.datamodels.ModelContainer.html no longer exists and references to ModelContainer in the docs lead to nowhere. The issue is that this was the only place where there was an example on how to assign a custom group_id and tweakreg_catalog to input images to tweakreg and/or resample.

Here is the old documentation: http://web.archive.org/web/20231004001719/https://jwst-pipeline.readthedocs.io/en/stable/api/jwst.datamodels.ModelContainer.html#id1