SNOW-3243341: e2e tests for pyarrow & pandas type conversion#629
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Update Python reference driver version and expand pandas/arrow fetch tests
Updates the default Python reference driver version from 4.2.0 to 4.3.0 in the pyproject.toml configuration for both standard and pandas environments.
Expands test coverage for pandas and arrow fetch methods by replacing simple multi-column tests with comprehensive type-specific parameterized tests. Each Snowflake data type (NUMBER, VARCHAR, FLOAT, BOOLEAN, DATE, TIME, TIMESTAMP variants, BINARY, VARIANT, ARRAY, OBJECT) now has dedicated test cases that verify correct value handling and null value processing.
Adds new test scenarios for advanced fetch options including decimal conversion via
arrow_number_to_decimalsetting, microsecond precision forcing for timestamps, and Arrow type validation for empty result sets withforce_return_table=True.