log_queries_not_using_index reduce verbosity

introduce log_slow_queries_not_using_indexes_filter='possible_keys, empty_table, small_table, small_table_first_pos'

• A possible key is found for the plan but not used
• Table is empty or less than 1 records
• Table is alone in the plan and less 1000 records
• Table is first in the plan less 1000 records and other tables are const or equ_ref