fix deprecation warnings ahead of Pytest 8.0

[zacharyburnett]

resolves SCSB-53

This PR addresses the Pytest deprecations introduced in 7.2 ahead of the 8.0 release.

Checklist

• added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)

[codecov]

Codecov Report

Base: 79.42% // Head: 79.42% // No change to project coverage 👍

Coverage data is based on head (4ddb138) compared to base (67d9e1a).
Patch has no changes to coverable lines.

❗ Current head 4ddb138 differs from pull request most recent head b93fa52. Consider uploading reports for the commit b93fa52 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #597   +/-   ##
=======================================
  Coverage   79.42%   79.42%           
=======================================
  Files          41       41           
  Lines        1244     1244           
=======================================
  Hits          988      988           
  Misses        256      256           

Flag	Coverage Δ
nightly	79.42% <0.00%> (ø)
unit	46.31% <0.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[ddavis-stsci]

LGTM

[nden]

I'm actually not sure what this function does. if it works 👍 to merging