fix: preg_replace evaluate double backslash for mysql driver and keep…

[hichxm]

Close #1482

[angeljqv]

• https://github.com/highlightjs/highlight.js/issues/4269#issue-3097738330

Also highlightjs does not support mysql/mariadb, postgres sql syntax/some keywords, example

-- escaped quote fails
select cast('text\' test' as char) as `field`; --'  dont work in highlightjs but works here and on other plugins