This is a fix for the Hashed Storage migration and Rollback procedure
to ignore any project-level validation error that can happen in a
long-running instance.

There are many situations where defaults and acceptable values changed
but, because we didn't provide a migration to "valid" attributes, it
can happen that project will not be `valid? => true`.

Because the changes we are making are limited to setting a project as
read_only or changing the storage_level, it's safe to bypass validation.