The hidden FTS "tables" were created by InnoDB with 0 timestamps
for 'created' and 'last_altered' on upgrade from 5.7, and for new
tables created in 8.0.11.

Upon a DD upgrade from 8.0.11 to 8.0.12, new DD tables are created,
and meta data is migrated to the new tables by INSERT statements.
This failed because 0 timestamps are not accepted with the server
default SQL mode.

This patch does the following:

1. Make sure FTS tables are created with correct timestamps.
2. Add an upgrade step when upgrading from before 8.0.12 to
   correct the 0 timestamps to CURRENT_TIMESTAMP before the
   meta data is migrated.

Additionally, error reporting from server side SQL statement
execution is improved.

Change-Id: Ic373931c3dd2ba46314c0d0c689ff0e8db61fa8e