x/website: https://cs.opensource.google/go missing indexes for x/telemetry, x/vuln, and x/pkgsite-metrics

[bcmills]

What did you do?

Navigate to https://cs.opensource.google/go.

What did you expect to see?

Entries for all of the x/ repos whose tests are reported on https://build.golang.org/.

What did you see instead?

Most x/ repos, but no entries for x/telemetry, x/vuln, or x/pkgsite-metrics.
That makes test failures in those repos more difficult to identify and report, since one cannot view the commit history of a failing test in the usual place.

(attn @golang/release)

[heschi]

cs.opensource.google isn't currently accepting new repos. Hopefully they'll unfreeze soon.