v1.2.336-nightly

What's Changed

Code Refactor 🎉

• refactor: Add KVPbApi::list_pb(), simplify UdfMgr::get_udfs() by @drmingdrmer in #14623
• refactor: Simplify UdfMgr::add_udf() by @drmingdrmer in #14631

Others 📒

• chore: add table index to explain join by @xudong963 in #14632
• chore(ci): fix download benchmark result by @everpcpc in #14633

Full Changelog: v1.2.335-nightly...v1.2.336-nightly