Add in CLI option to handle collection_category flag

[alexgleith]

Simpler than I thought it would be.

Turns out we really shouldn't have implemented the dataset_filter option and just used this existing predicate logic...

[codecov]

Codecov Report

Merging #22 (229a207) into develop (c30a71e) will decrease coverage by 0.12%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           develop      #22      +/-   ##
===========================================
- Coverage    62.01%   61.88%   -0.13%     
===========================================
  Files           20       20              
  Lines         1940     1944       +4     
===========================================
  Hits          1203     1203              
- Misses         737      741       +4     

Impacted Files	Coverage Δ
odc/stats/tasks.py	39.55% <0.00%> (-0.45%)	⬇️

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[SpacemanPaul]

The current predicate implementation seems very odd to me.

Why are lsn_sr products handled separately, and why are they hard-coded? Why does it default to True for non lsn_sr products?