DM-34265: Abort clustering if Quantum missing value.

[MichelleGower]

Checklist

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

[codecov]

Codecov Report

Merging #103 (521fd80) into main (1c4f7c9) will increase coverage by 12.12%.
The diff coverage is 97.72%.

@@             Coverage Diff             @@
##             main     #103       +/-   ##
===========================================
+ Coverage   47.11%   59.23%   +12.12%     
===========================================
  Files          29       32        +3     
  Lines        1974     2220      +246     
  Branches      319      356       +37     
===========================================
+ Hits          930     1315      +385     
+ Misses       1023      871      -152     
- Partials       21       34       +13     

Impacted Files	Coverage Δ
python/lsst/ctrl/bps/clustered_quantum_graph.py	54.11% <40.00%> (+25.80%)	⬆️
tests/test_quantum_clustering_funcs.py	98.05% <98.05%> (ø)
tests/cqg_test_utils.py	98.11% <98.11%> (ø)
python/lsst/ctrl/bps/quantum_clustering_funcs.py	99.20% <100.00%> (+99.20%)	⬆️
tests/qg_test_utils.py	100.00% <100.00%> (ø)

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