Setting allow_experimental_join_condition marked as obsolete, because it

Why it matters

Previously, the allow_experimental_join_condition setting was required to enable experimental join conditions in ClickHouse. This change simplifies configuration by removing the need to enable this setting, making these join conditions readily available to users by default and improving usability.

How to use it

Users no longer need to set allow_experimental_join_condition for experimental join conditions as the feature is permanently enabled. Existing configurations referencing this setting can be removed.