jwe, labeled_rate, url, and text fields should show e.g. url as the metrics field, not url2

[fbertsch]

This is a followup to bug https://bugzilla.mozilla.org/show_bug.cgi?id=1737656#c21. In that bug, we migrated the above metric types to a corresponding 2 field, e.g. metrics.url2.$field. As such the metric shows up in that 2 field in the live and stable tables.

The views, however, expose them as they should be, e.g. metrics.url. So we should link to those instead, since people query this data in `mozdata.