VARIANT, GEOMETRY, GEOGRAPHY missing from DataType enum

Documentation: https://docs.databricks.com/api/workspace/tables/get
> [type_name](https://docs.databricks.com/api/workspace/tables/get#columns-type_name)
> Enum: `BOOLEAN | BYTE | SHORT | INT | LONG | FLOAT | DOUBLE | DATE | TIMESTAMP | STRING | BINARY | DECIMAL | INTERVAL | ARRAY | STRUCT | MAP | CHAR | NULL | USER_DEFINED_TYPE | TIMESTAMP_NTZ | VARIANT | GEOMETRY | GEOGRAPHY | TABLE_TYPE`

Implementation:
https://github.com/Azure/azure-databricks-client/blob/0a5fe346ef0b286e8dcc1da990423447820ff289/csharp/Microsoft.Azure.Databricks.Client/Models/UnityCatalog/DataTypeEnum.cs#L3-L26

Currently the following data types are missing, causing deserialization errors:
- `VARIANT`
- `GEOMETRY`
- `GEOGRAPHY`

Open csharp/Microsoft.Azure.Databricks.Client/Models/UnityCatalog/DataTypeEnum.cs and compare the enum with the documented type_name values in the Databricks tables API. Confirm that VARIANT, GEOMETRY, and GEOGRAPHY are represented, then verify that Unity Catalog responses containing those values no longer fail deserialization.

Written by the indexing model from the issue text.