fix: no longer automatically execute cachetool task

[stijnbernards]

Issue

Currently the Hypernode deploy always executes the cachetool opcache flush task.
This task is extremely flakey and fails a lot on our end. Same issue as on the Hipex servers.

Solution

This task can be safely removed, or at least marked optional as it's not required on Hypernode.

For reference see: https://deployer.org/docs/7.x/avoid-php-fpm-reloading
And in the Hypernode NGINX configuration /etc/nginx/fastcgi_params the following line fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
Which makes it so that no longer opcache has to be flushed.

I've tested this and validated this on multiple customers on our end.

[tdgroot]

Good suggestion, I agree that this should be optional! Some of our customers are actually relying on cachetool because they manually opted for disabling opcache revalidation so let's keep the task in here, but make it optional.

[tdgroot]

I think the after after('cachetool:clear:opcache' can remain, because when you actually make use of that task, you don't need to think about the cleanup.

Otherwise, I agree that this should be optional!