Disable the object cache dropin for local testing

[renatonascalves]

Description

Locally, Mantle can load the object-cache.php dropin file which can impact the running of the unit tests.

Use Case

I'd propose a helper method, ->without_object_cache(), that can be chained. It's similar to how I was able to stop it in a client project.

->on( 'enable_loading_object_cache_dropin', function ( $retval ): bool {
    if ( defined( 'VIP_GO_APP_ENVIRONMENT' ) && 'local' === \VIP_GO_APP_ENVIRONMENT ) {
        return false;
    }

    return $retval;
} )

This example assumes VIP_GO_APP_ENVIRONMENT is used, but we could create a custom env or the helper method could accept a callback/validator.

[renatonascalves]

@srtfisher Do you have a preference for the implementation? A custom env or a callback/validator?