Dev Skip check for deprecated MySQL options (#1693)

• Skip check for deprecated MySQL options

innodb_file_format, innodb_file_format_max and large_file_prefix options are deprecated since MySQL 5.7 and MariaDB 10.2
https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html
https://mariadb.com/kb/en/innodb-system-variables
Solve the issue https://forums.limesurvey.org/forum/installation-a-update-issues/120918-error-to-install-ls-4-1-17-with-mysql-8-and-innodb

• Update InstallerConfigForm.php