set a TTL for OOPS data when it is submitted

A TTL is set for snap crashes when they are submitted to the Ubuntu Error Tracker. From daisy/submit.py:

    try:
        if problem_type == 'Snap':
            expire = True
        else:
            expire = False
        oopses.insert_dict(_session, oops_id, data, system_token, fields,
                           proposed_pkg=package_from_proposed, ttl=expire)

However, this is not done for regular crash reports. As mentioned in the following mailing list thread:

https://lists.ubuntu.com/archives/ubuntu-devel/2022-May/042057.html

A TTL should also be set for Ubuntu crash reports and the expiration date for that data should be when the release reaches its end of standard support. We'll likely want to pass a value for the TTL to oopses.py, instead of a boolean, and do some maths using the end of standard support data from distro-info-data to determine that value.