Avoid using mysql.proc table

There is different reason not to use mysql.proc table :

• for xpand compatibility
• some clouds doesn't permit access to mysql.proc table (like SkySQL)
• mysql 8 compatibility

for metadata about FUNCTION/PROCEDURE, driver use mysql.proc to retrieve all informations.

This task is to verify that those information can be available using SHOW PROCEDURE/FUNCTION STATUS / or using information_schema.