Remove query metrics from snapshot_policy

[taohe1012]

Remove query metrics from snapshot_policy:
Snapshot_policy resource type is not supported by metrics/query REST Api since there are no metrics for this resource type.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.62%. Comparing base (2e77e47) to head (b6178e0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #48      +/-   ##
==========================================
- Coverage   95.63%   95.62%   -0.01%     
==========================================
  Files          67       67              
  Lines        4052     4044       -8     
==========================================
- Hits         3875     3867       -8     
  Misses        177      177              

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