Use str_contains for the auto_increment EXTRA check

Match the str_contains predicate used by the column filter just above,
so both call sites identify auto_increment columns the same way.

Author: JanJakes

packages/mysql-on-sqlite/src/sqlite/class-wp-pdo-mysql-on-sqlite.php

@@ -5135,7 +5135,7 @@ function ( $column ) use ( $is_strict_mode, $insert_map ) {
 				$position          = array_search( $column['COLUMN_NAME'], $insert_list, true );
 				$identifier        = $this->quote_sqlite_identifier( $select_list[ $position ] );
 				$value             = $this->cast_value_for_saving( $column['DATA_TYPE'], $identifier );
-				$is_auto_increment = 'auto_increment' === $column['EXTRA'];
+				$is_auto_increment = str_contains( $column['EXTRA'], 'auto_increment' );
 
 				/*
 				 * In MySQL, inserting 0 into an AUTO_INCREMENT column increments