fix remaining i2d mentions and add coadd suffix

[braingram]

This PR removes the remaining i2d suffix mentions in the docs and adds coadd to the understood suffixes.

The addition of coadd to the suffixes is required for steps that process _coadd files (like SourceCatalog) to allow them to remove the previous file suffix when saving a result with a new suffix. For example the source catalog step is currently failing on main due to failure to remove the coadd suffix as seen in the following log messages:

INFO     stpipe.SourceCatalogStep:step.py:1037 Saved model in r0099101001001001001_r274dp63x31y81_prompt_F158_coadd_segm.asdf
INFO     stpipe.SourceCatalogStep:step.py:1037 Saved model in r0099101001001001001_r274dp63x31y81_prompt_F158_coadd_cat.asdf
INFO     stpipe.SourceCatalogStep:step.py:1037 Saved model in r0099101001001001001_r274dp63x31y81_prompt_F158_coadd_cat.asdf

Note that coadd wasn't removed from the filename leading to regtest failures since the above files have unexpected names.

Regression tests: https://github.com/spacetelescope/RegressionTests/actions/runs/12126363248

Tasks

• request a review from someone specific, to avoid making the maintainers review every PR
• add a build milestone, i.e. 24Q4_B15 (use the latest build if not sure)
• Does this PR change user-facing code / API? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see below for change types)
  • update or add relevant tests
  • update relevant docstrings and / or docs/ page
  • start a regression test and include a link to the running job (click here for instructions)
    • Do truth files need to be updated ("okified")?
      • after the reviewer has approved these changes, run okify_regtests to update the truth files
• if a JIRA ticket exists, make sure it is resolved properly

news fragment change types...

• changes/<PR#>.general.rst: infrastructure or miscellaneous change
• changes/<PR#>.docs.rst
• changes/<PR#>.stpipe.rst
• changes/<PR#>.associations.rst
• changes/<PR#>.scripts.rst
• changes/<PR#>.mosaic_pipeline.rst
• changes/<PR#>.patch_match.rst

steps

• changes/<PR#>.dq_init.rst
• changes/<PR#>.saturation.rst
• changes/<PR#>.refpix.rst
• changes/<PR#>.linearity.rst
• changes/<PR#>.dark_current.rst
• changes/<PR#>.jump_detection.rst
• changes/<PR#>.ramp_fitting.rst
• changes/<PR#>.assign_wcs.rst
• changes/<PR#>.flatfield.rst
• changes/<PR#>.photom.rst
• changes/<PR#>.flux.rst
• changes/<PR#>.source_detection.rst
• changes/<PR#>.tweakreg.rst
• changes/<PR#>.skymatch.rst
• changes/<PR#>.outlier_detection.rst
• changes/<PR#>.resample.rst
• changes/<PR#>.source_catalog.rst

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.69%. Comparing base (6e73a27) to head (4c39a4b).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1548   +/-   ##
=======================================
  Coverage   76.69%   76.69%           
=======================================
  Files         120      120           
  Lines        7830     7830           
=======================================
  Hits         6005     6005           
  Misses       1825     1825           

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[schlafly]

Thanks Brett! @ddavis-stsci , look good to you?