Add intro to Procedure in the Hive connector

Cherry-pick of trinodb/trino#11205

Add an introduction to the Procedure section in the Hive connector.
Include information about call a procedure and an example.

Co-authored-by: Rose Williams <rose.williams@starburstdata.com>

presto-docs/src/main/sphinx/connector/hive.rst

@@ -719,6 +719,14 @@ The following operations are not supported when ``avro_schema_url`` is set:
 Procedures
 ----------
 
+Use the :doc:`/sql/call` statement to perform data manipulation or
+administrative tasks. Procedures must include a qualified catalog name, if your
+Hive catalog is called ``web``::
+
+    CALL web.system.example_procedure()
+
+The following procedures are available:
+
 * ``system.create_empty_partition(schema_name, table_name, partition_columns, partition_values)``
 
     Create an empty partition in the specified table.