Fix unique_devices canonical domain
When updating unique-devices to use a new access_method column, we
introduced a bug in the domain, removing the leading www. from the
canonical domains using it.
This patch adds a new table to the loading job (HQL patch here:
https://gerrit.wikimedia.org/r/c/analytics/refinery/+/1194885)
to use the canonical domain when it exists in the canonical_data.wikis
table.
Bug: T405533