Add WP_DISABLE_FATAL_ERROR_HANDLER=true constant to development

[strarsis]

Summary

WordPress automatically sends an admin email when a fatal PHP error is encountered.
However, this is usually not intended in development (it is very annoying/confusing actually).

Setting the WP_DISABLE_FATAL_ERROR_HANDLER constant to true prevents sending those WordPress admin error emails.

Config::define('WP_DISABLE_FATAL_ERROR_HANDLER',true);

Additional context

https://wordpress.stackexchange.com/a/361002/134384

[Tofandel]

https://github.com/roots/bedrock/blame/6acbb2420eacf893294d9aec2e357d720b576861/config/environments/development.php#L13

it's been there for 5years