Allow Carriage Return in Regexp Parsing

Why it matters

This feature addresses the issue where carriage return characters (\r) in the middle of input lines caused parsing failures or incorrect data interpretation when using the Regexp input format. By supporting carriage returns inside lines, it enhances robustness and correctness of parsing multiline or Windows-style line endings, improving data ingestion reliability.

How to use it

When using the Regexp input format to parse data, users can now include carriage return characters inside the input lines without errors. No additional configuration is required; the parsing behavior is improved by default in the updated ClickHouse version.