SNOW-3375255: enable Python 3.14 UDF tests

[sfc-gh-bkogan]

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

   Fixes SNOW-3375255

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.

   UDF tests were disabled due to not having an available build in PyPI. Now we do.

Dynamic dbapi package resolution

Replaced the single UDTF_PACKAGE_MAP with two maps and a resolver:

• _ANACONDA_UDTF_PACKAGE_MAP — the original list (uses psycopg2, msodbcsql, databricks-sql-connector).
• _PYPI_UDTF_PACKAGE_MAP — a PyPI-compatible subset. Postgres uses psycopg2-binary. SQL Server and Databricks are intentionally omitted.
• resolve_udtf_packages(dbms_type, artifact_repository) picks the right list. On PyPI for SQL Server / Databricks it raises SnowparkClientException with a clear message telling the user to switch to Anaconda.
  In BaseDriver.udtf_ingestion we now call session._get_default_artifact_repository() to get the session's effective default (which also honours account/database/schema overrides via SYSTEM$GET_DEFAULT_PYTHON_ARTIFACT_REPOSITORY) and resolve the package list accordingly. Result: a 3.14 user automatically gets the PyPI-friendly list, and a <3.14 user who has manually switched to PyPI also gets a working list (or a clear error for SQL Server/Databricks).

Tests skipped on Python 3.14

• test_sql_server.py — all UDTF-path variants (directly or via pytest.param(..., marks=...) for parametrized mixes). msodbcsql is not on PyPI at all. The non-UDTF (client-side) variants still run.
• test_databricks.py — test_udtf_ingestion_databricks and test_session_init_udtf (the two tests that exercise the UDTF install path). thrift is sdist-only on PyPI and the Anaconda channel lacks a 3.14 build of databricks-sql-connector.

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[sfc-gh-bkogan]

I have read the CLA Document and I hereby sign the CLA

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.41%. Comparing base (e7c3d2e) to head (7d45568).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4172      +/-   ##
==========================================
+ Coverage   95.16%   95.41%   +0.25%     
==========================================
  Files         171      171              
  Lines       43788    43801      +13     
  Branches     7503     7505       +2     
==========================================
+ Hits        41672    41794     +122     
+ Misses       1294     1227      -67     
+ Partials      822      780      -42     

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[sfc-gh-yuwang]

The data source part LGTM

[sfc-gh-aling]

LGTM!