Improve DateTime Type Inference for Text Formats in ClickHouse

Why it matters

This feature addresses issues where DateTime values were inaccurately inferred from numbers when reading text data formats, disregarding the configured date_time_input_format. It ensures consistent and predictable parsing of datetime inputs, enhancing data import reliability and preventing erroneous timestamp conversions.

How to use it

Users should configure the date_time_input_format setting according to their input format requirements. The improved inference mechanism will automatically respect this setting when parsing DateTime columns from text formats, eliminating the need for additional changes in query syntax or data imports.