It is not necessary to support INSERT DELAYED for a single value insert,
while we do not support that for multi-values insert when binlog is
enabled in SBR.

The lock_type is upgrade to TL_WRITE from TL_WRITE_DELAYED for
INSERT DELAYED for single value insert as multi-values insert
did when binlog is enabled. Then it's safe. And binlog it as
INSERT without DELAYED.

mysql-test/extra/binlog_tests/binlog_insert_delayed.test:
  Added test case for bug#57666.
mysql-test/suite/binlog/r/binlog_row_binlog.result:
  Updated for bug#57666
mysql-test/suite/binlog/r/binlog_statement_insert_delayed.result:
  Updated for bug#57666
mysql-test/suite/binlog/r/binlog_stm_binlog.result:
  Updated for bug#57666
mysql-test/suite/rpl/r/rpl_stm_insert_delayed.result:
  Updated for bug#57666
sql/sql_insert.cc:
  Updated code for the following things:
  1. Upgrade the lock_type to TL_WRITE from TL_WRITE_DELAYED
  for INSERT DELAYED for single value insert as multi-values
  insert did when binlog is enabled.
  2. Clear code to not binlog INSERT DELAYED STMT in SBR.
  3. Get rid of privilege check for log_on.