Filter Sites By Page Views and CWV

To maximize our chances to scale and get overview across all live domains, @meryllblanchet proposes to being able to list/view:
All live domains
... of which weekly traffic on homepage is > 70k page views (or avg 10k page views per day to eliminate possible daily spikes)
... of which CWV are green on mobile (secondary prio desktop) vs red
This is the baseline for us to identify how to either witness or get traffic growth and/or conversions growth by the magic of page speed.

@basecode says: let's also add domains which are not live yet and have avg 10k page views per day on current page (ignore CWV). why? because we cannot afford to wait 6-12 weeks for their organic traffic to recover and want to do pre-golive assessment

This could be woven into a larger, more generic filtering mechanic for sites.

The issue does not name files, tests, or entry points. Start by locating the existing site-listing and filtering flow, then trace where weekly or daily page views and mobile or desktop CWV data enter the service. Done means filtering live and not-yet-live domains by the stated traffic thresholds and showing their CWV status, with the pre-golive rule applied.

Written by the indexing model from the issue text.