Signs all x-amz-* headers as required by AWS S3 docs

Why it matters

This feature ensures compliance with AWS S3 security requirements by signing all x-amz-* headers during request authentication. It improves compatibility and security when ClickHouse interacts with AWS S3 storage.

How to use it

The signing of x-amz-* headers is handled automatically when using the S3 table engine or S3 integration features in ClickHouse. No additional user configuration is required.