Add ON CLUSTER Support for CREATE DICTIONARY Queries

Why it matters

This feature allows users to create dictionaries simultaneously on all nodes of a ClickHouse cluster using a single CREATE DICTIONARY ON CLUSTER command. It simplifies cluster management by ensuring dictionary definitions are consistent across all nodes and reduces manual effort.

How to use it

Use the CREATE DICTIONARY statement with the ON CLUSTER 'cluster_name' clause to create a dictionary on all nodes in the specified cluster. For example:

CREATE DICTIONARY dictionary_name ON CLUSTER 'cluster_name' (...) SETTINGS ...;