test: Fix data_pagesize_limit extraction in parquet writer props roundtrip test

[jackylee-ch]

Which issue does this PR close?

N/A

Rationale for this change

In the test helper session_config_from_writer_props, data_pagesize_limit is extracted from props.dictionary_page_size_limit() instead of props.data_page_size_limit(). The bug is masked because parquet_options_with_non_defaults sets both limits to the same value (42), so the roundtrip test cannot catch a mixed-up mapping between these two options.

What changes are included in this PR?

• Extract data_pagesize_limit from props.data_page_size_limit().
• Use distinct values for data_pagesize_limit (42) and dictionary_page_size_limit (43) in the test options so the roundtrip test can detect such mix-ups.

Are these changes tested?

Yes, covered by the existing table_parquet_opts_to_writer_props roundtrip test. Verified that reverting the extraction fix now makes the test fail.

Are there any user-facing changes?

No, test-only change.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.66%. Comparing base (7ca6e54) to head (afd7dec).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #23664      +/-   ##
==========================================
- Coverage   80.66%   80.66%   -0.01%     
==========================================
  Files        1086     1086              
  Lines      366694   366694              
  Branches   366694   366694              
==========================================
- Hits       295806   295794      -12     
- Misses      53265    53269       +4     
- Partials    17623    17631       +8     

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