[SQL][MINOR] DESC should use 'Catalog' as partition provider

## What changes were proposed in this pull request?

`CatalogTable` has a parameter named `tracksPartitionsInCatalog`, and in `CatalogTable.toString` we use `"Partition Provider: Catalog"` to represent it. This PR fixes `DESC TABLE` to make it consistent with `CatalogTable.toString`.

## How was this patch tested?

N/A

Author: Wenchen Fan <wenchen@databricks.com>

Closes #16035 from cloud-fan/minor.

sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala

@@ -489,7 +489,7 @@ case class DescribeTableCommand(
     if (table.tableType == CatalogTableType.VIEW) describeViewInfo(table, buffer)
 
     if (DDLUtils.isDatasourceTable(table) && table.tracksPartitionsInCatalog) {
-      append(buffer, "Partition Provider:", "Hive", "")
+      append(buffer, "Partition Provider:", "Catalog", "")
     }
   }