DDC-2938: Support all time intervals on DATE_ADD

[doctrinebot]

Jira issue originally created by user vecchia:

The DATE_ADD built-in function of Doctrine supports only the "hour", "month" and "day" intervals. I don't see the point of not having all the intervals available. These should be "minute", "second" and "year". I didn't check compatibility with other database vendors rather than MySQL but I don't think it should be a problem