SNOW-3375781: Preserve 1-pass read for SCOS XML user schema performance

[sfc-gh-mayliu]

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

   Fixes SNOW-3375781

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
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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 internal _XML_SKIP_INFERENCE option to preserve 1-pass read in SCOS XML with user schema.
Snowpark Python now supports XML inferSchema=False to produce all StringType columns for leaf tags while preserving nested structures (to be released in v1.50.0). Since SCOS custom-schema turns off inferSchema flag, a 2-pass read would be triggered in Snowpark after release.

This PR serves to preserve the 1-pass read performance in SCOS XML custom-schema scenarios to adhere to Spark behaviors -- no behavioral changes whatsoever, pure performance improvement. The private _XML_SKIP_INFERENCE option in SCOS is an internal contract to preserve performance.
Relevant SCOS PR: https://github.com/snowflake-eng/sas/pull/3687

[github-actions]

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[sfc-gh-mayliu]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.42%. Comparing base (7c853e1) to head (f36a7d4).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

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##             main    #4185   +/-   ##
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  Coverage   95.42%   95.42%           
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  Files         171      171           
  Lines       43615    43684   +69     
  Branches     7459     7475   +16     
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+ Hits        41620    41686   +66     
- Misses       1220     1221    +1     
- Partials      775      777    +2     

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