v0.6.19-nightly

What's Changed

Bug Fixes

• ISSUE-3698: Support as case-insensitive when create udf (#3703) by @kevinw66

Build/Testing/CI

• feat: wait_tcp.py to python3 (#3701) by @yihong0618

Documentation

• Refine 0005-new-sql-planner-framework.md (#3702) by @leiysky

Improvement

• ISSUE-3605: Replace arrow flight with gRPC (#3606) by @ariesdevil
• ci: Cleanup to maximize available build space (#3688) by @sundy-li
• feat: wait_tcp.py to python3 (#3701) by @yihong0618
• Cli up improvement (#3699) by @sundy-li

Others

• ISSUE-3698: Support as case-insensitive when create udf (#3703) by @kevinw66
• ci: Cleanup to maximize available build space (#3688) by @sundy-li
• Refine 0005-new-sql-planner-framework.md (#3702) by @leiysky
• feat: wait_tcp.py to python3 (#3701) by @yihong0618
• Cli up improvement (#3699) by @sundy-li