SNOW-3472759: to_polars() AST support

[sfc-gh-mayliu]

1. Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-3472759

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
     • If this test skips Local Testing mode, I'm requesting review from @snowflakedb/local-testing
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am adding new credentials
   • I am adding a new dependency
   • If this is a new feature/behavior, I'm adding the Local Testing parity changes.
   • I acknowledge that I have ensured my changes to be thread-safe. Follow the link for more information: Thread-safe Developer Guidelines
   • If adding any arguments to public Snowpark APIs or creating new public Snowpark APIs, I acknowledge that I have ensured my changes include AST support. Follow the link for more information: AST Support Guidelines

3. Please describe how your code solves the related issue.

   Please write a short description of how your code change solves the related issue.

Add AST support for to_polars()
Stacked on #4288

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.11%. Comparing base (b293da5) to head (0e7f8fd).

Additional details and impacted files

@@                        Coverage Diff                         @@
##           SNOW-3472759-support-to-polars    #4290      +/-   ##
==================================================================
- Coverage                           95.45%   95.11%   -0.35%     
==================================================================
  Files                                 171      171              
  Lines                               44543    44553      +10     
  Branches                             7622     7624       +2     
==================================================================
- Hits                                42519    42376     -143     
- Misses                               1253     1364     +111     
- Partials                              771      813      +42     

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