feat: add support for date constant expression for mongo

[GurtejSohi]

Description

Adding support for date constant expression for mongo. For postgres, for now, we're not supporting it but can be supported later.

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

[github-actions]

Test Results

 71 files  ±0   71 suites  ±0   33s ⏱️ -1s
517 tests ±0  517 ✅ ±0  0 💤 ±0  0 ❌ ±0 
834 runs  +2  834 ✅ +2  0 💤 ±0  0 ❌ ±0 

Results for commit 8ec75f1. ± Comparison against base commit 35fac78.

[codecov]

Codecov Report

❌ Patch coverage is 35.00000% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.26%. Comparing base (35fac78) to head (8ec75f1).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...tore/mongo/query/parser/MongoProjectingParser.java	0.00%	6 Missing ⚠️
...ser/MongoNonProjectedSortTypeExpressionParser.java	0.00%	3 Missing ⚠️
...umentstore/expression/impl/ConstantExpression.java	83.33%	1 Missing ⚠️
...ansformer/MongoSelectionsAddingTransformation.java	0.00%	1 Missing ⚠️
...sformer/MongoSelectionsUpdatingTransformation.java	0.00%	1 Missing ⚠️
...umentstore/parser/SelectTypeExpressionVisitor.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #262      +/-   ##
============================================
- Coverage     80.41%   80.26%   -0.15%     
  Complexity     1337     1337              
============================================
  Files           231      231              
  Lines          6060     6080      +20     
  Branches        545      545              
============================================
+ Hits           4873     4880       +7     
- Misses          813      826      +13     
  Partials        374      374              

Flag	Coverage Δ
integration	80.26% <35.00%> (-0.15%)	⬇️
unit	58.02% <0.00%> (-0.20%)	⬇️

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