Fix check-model-has-properties-file for snapshots

[ms32035]

Fixes #41

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (f4b9b6c) 100.00% compared to head (ba05f1c) 100.00%.

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Additional details and impacted files

@@            Coverage Diff            @@
##              main      #137   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           47        47           
  Lines         2206      2210    +4     
  Branches       272       272           
=========================================
+ Hits          2206      2210    +4     

Impacted Files	Coverage Δ
dbt_checkpoint/check_model_has_properties_file.py	100.00% <100.00%> (ø)
dbt_checkpoint/utils.py	100.00% <100.00%> (ø)

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[BAntonellini]

@ms32035 thank you for contributing.

Could you extend test_check_model_has_properties_file covering this new get_snapshots logic?

[ms32035]

@BAntonellini a test has been added