MySQL's `CREATE TABLE ... SELECT` syntax

[lovasoa]

SQLite, Postgres, MsSQL and MySQL all support the CREATE TABLE table_name(columns) AS SELECT ....

However, MySQL (and Mariadb) allow omitting the AS keyword, and specifying a table like

CREATE TABLE bar (m INT) SELECT n FROM foo;

Currently, sqlparser parses this as two distinct statements: a create table followed by a select. Instead, it should parse it the same as

CREATE TABLE bar (m INT) AS SELECT n FROM foo;

https://dev.mysql.com/doc/refman/8.4/en/create-table-select.html

[alamb]

I believe this is fixed in #1515 (thanks @wugeer !)