This is a follow-up for the initial MDEV-24486 commit. It renames
the view sys.table_privileges to sys.privileges_by_table_by_level
and adds some more tests displaying privilege levels GLOBAL and SCHEMA
The existing INFORMATION_SCHEMA.TABLE_PRIVILEGES displays only those
privileges that were specifically granted on the table level,
whereas it may be useful to see privileges granted at the database
and global level.
This commit adds a new view `table_privileges` to the `sys` schema
for that purpose. The view shows privileges on existing tables
and views, combining all possible levels:
- user_privileges
- schema_privileges
- table_privileges
- Moved view checks after privilege tables are fixed. This is to avoid
warnings about wrongly defined mysql.proc when checking views.
- Don't use stat tables before they have been fixed.
- Don't run mysql_fix_view() if 'FOR MYSQL' is used if the view is
already a MariaDB view.
- Added 'FOR UPGRADE' as an option for 'REPAIR VIEW' to be able to
detect if the REPAIR command comes from mariadb_upgrade. In this
case we get a warning, instead of an error, if a definer of a view
does not exists.
