NOTE: This may break crash-upgrade from a dataset that was
created with innodb_log_optimize_ddl=ON. Also due to
ROW_FORMAT=COMPRESSED pages, it will be easiest to disallow
crash-upgrade.

It would be more robust to disable the MDEV-12699 logic when
crash-upgrading from old redo log format.

log_optimized_ddl_op: Remove.

fil_space_t::enable_lsn, file_name_t::enable_lsn: Remove.

ddl_tracker_t::optimized_ddl: Remove.

TODO: Remove ddl_tracker