✨ Source S3: Add region to S3 source

[tolik0]

What

This PR is a duplicate of: #31701
Fixes #20860

How

Adds support for specifying region as a part of specifying the S3 source connector.

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[github-actions]

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[Object905]

This PR marked as fixes #20860, but this issue is about destination, not source. It would be nice if it were fixed for both.