Disallow arrayJoin on partition expressions

Why it matters

This feature prevents the use of the arrayJoin function within partition expressions. It addresses potential issues and inconsistencies that can arise when using complex array operations in partitioning, ensuring more predictable partition behavior and query stability.

How to use it

The restriction is applied automatically by ClickHouse. Users should avoid using arrayJoin in their partition key definitions to comply with this rule and ensure their tables are created and queried without errors.