Support CREATE EXTERNAL TABLE PARTITIONED BY syntax with DataFusion

### Is your feature request related to a problem or challenge?

We want to support registering partitioned tables into datafusion using `CREATE EXTERNAL TABLE PARTITIONED BY`

### Describe the solution you'd like

_No response_

### Willingness to contribute

I can contribute to this feature independently

Start by locating the DataFusion integration and how CREATE EXTERNAL TABLE statements are currently processed. Define the expected behavior for CREATE EXTERNAL TABLE PARTITIONED BY and add coverage for registering partitioned tables; done means the syntax works as requested.

Written by the indexing model from the issue text.