cirrus: Add FreeBSD 13.0 job and disable sanitizer build

cirrus: Add FreeBSD 13.0 job and disable sanitizer build

As alluded to the in the now removed comment, a 13.0 image became
available and is now ready to be used.

The sanitizer builds were running on the 12.1 image which since has
been removed from the config, leaving the builds not running at all.
When enabled it turns out that they don't actually work due to very
long timeouts in executing the tests, so keep the disabled for now
but a bit more controlled.

Closes #7592