Close StatementClient when hitting client-side timeout

[takezoe]

Purpose

Ensure sending a query cancel request when hitting client-side timeout.

Overview

StatementClient.close sends a query cancel request but it doesn't work after hitting the client-side timeout because the internal state has been changed by raise_timeout_error! when close is called.

In order to ensure sending a query cancel request, call close automatically before throwing the exception when hitting the client-side timeout.

This is a port of trinodb/trino#24446

Checklist

• Code compiles correctly
• Created tests which fail without the change (if possible)
• All tests passing
• Extended the README / documentation, if necessary

[miniway]

The change looks good to me. We might need to fix test failure if possible also

[ganmacs]

We need to add HTTP stub stub_request(:delete, "localhost/v1/next_uri") to failed tests.

[takezoe]

Yes, with verification to check that cancel request was sent.