v0.6.8-nightly

What's Changed

Bug Fixes

• ISSUE-1216: Fix ClickHouse progress hang in some queries (#3547) by @bohutang

Features

• Support drop stage (#3550) by @GrapeBaBa
• add soundex function (#3446) by @bestgopher

Improvement

• ISSUE-3541: Remove ProgressCallback (#3544) by @bohutang

Others

• ISSUE-1216: Fix ClickHouse progress hang in some queries (#3547) by @bohutang
• ISSUE-3541: Remove ProgressCallback (#3544) by @bohutang