test: fix tests broken by pandas 3 release

[westonpace]

Pandas 3 just released. This caused some tests to fail.

[github-actions]

PR Review

Summary: Simple test fix for Pandas 3 compatibility. No issues found.

The change adds check_dtype=False to two assert_frame_equal calls in test_duckdb. This is an appropriate fix when Pandas 3 changes internal dtype handling for filter operations while the actual values remain correct.

Verdict: ✅ LGTM - straightforward compatibility fix.

[westonpace]

Duckdb is still using the old "object based strings" approach when creating a dataframe. Lance (presumably via pyarrow) now creates "arrow based strings" when creating a dataframe.

[Xuanwo]

There are tests failed for

FAILED python/tests/test_scalar_index.py::test_fts_multi_match_query - AssertionError: 
Arrays are not equal
Column title values don't match
Mismatched elements: 2 / 2 (100%)
Mismatch at indices:
 [0]: title common (ACTUAL), title vector (DESIRED)
 [1]: title vector (ACTUAL), title common (DESIRED)
 ACTUAL: array(['title common', 'title vector'], dtype=object)
 DESIRED: array(['title vector', 'title common'], dtype=object)
FAILED python/tests/test_scalar_index.py::test_distributed_fts_multi_match_validation - AssertionError: 
Arrays are not equal
Column title values don't match
Mismatched elements: 2 / 2 (100%)
Mismatch at indices:
 [0]: title vector (ACTUAL), title common (DESIRED)
 [1]: title common (ACTUAL), title vector (DESIRED)
 ACTUAL: array(['title vector', 'title common'], dtype=object)
 DESIRED: array(['title common', 'title vector'], dtype=object)

[Xuanwo]

I'm going to merge this PR first and working on others.