Added test cases for CONTAINS/NOT CONTAINS on Nested Arrays in Flat Collections

[suddendust]

Description

These test cases cover the following cases when the LHS is a nested array in a flat collection:

1. CONTAINS scalar: Looks if the LHS array contains the RHS value.
2. NOT_CONTAINS scalar.
3. CONTAINS array: Looks for exact match of the RHS array (similar to Mongo).
4. NOT_CONTAINS array.

Testing

Added integration tests.

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.44%. Comparing base (c771349) to head (a43fb87).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #256      +/-   ##
============================================
+ Coverage     80.40%   80.44%   +0.03%     
  Complexity     1256     1256              
============================================
  Files           227      227              
  Lines          5839     5839              
  Branches        517      517              
============================================
+ Hits           4695     4697       +2     
+ Misses          790      789       -1     
+ Partials        354      353       -1     

Flag	Coverage Δ
integration	80.44% <ø> (+0.03%)	⬆️
unit	57.68% <ø> (ø)

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