RCAL-712: Add Members Keyword to Resample Schema

[PaulHuwe]

Resolves RCAL-712

Closes #

This PR adds the members keyword to the resample datamodel maker utility.

Checklist

• [x] Added entry in CHANGES.rst under the corresponding subsection
• [ ] updated relevant tests
• [ ] updated relevant documentation
• [x] Passed romancal regression testing on Jenkins / PLWishMaster. Link: https://plwishmaster.stsci.edu:8081/job/RT/job/romancal/692/

[codecov[bot]]

Codecov Report

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

Project coverage is 97.33%. Comparing base (087a60d) to head (13c2778). Report is 9 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #333 +/- ## ========================================== - Coverage 97.56% 97.33% -0.24% ========================================== Files 30 31 +1 Lines 2788 2959 +171 ========================================== + Hits 2720 2880 +160 - Misses 68 79 +11 ```

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[PaulHuwe]

PR Approved and merged.