DM-38764: Add exclude list to MemoryTestCase.

[ktlim]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (c9b3637) 93.61% compared to head (ff3e612) 93.62%.

❗ Current head ff3e612 differs from pull request most recent head 4f1a149. Consider uploading reports for the commit 4f1a149 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #154   +/-   ##
=======================================
  Coverage   93.61%   93.62%           
=======================================
  Files          43       43           
  Lines        2695     2697    +2     
=======================================
+ Hits         2523     2525    +2     
  Misses        172      172           

Impacted Files	Coverage Δ
python/lsst/utils/tests.py	76.70% <100.00%> (+0.14%)	⬆️
tests/test_utils.py	97.81% <100.00%> (ø)

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[timj]

Thanks for doing this.