cmd/etl: unexcluded github.com/clevergo/clevergo
cmd/etl: unexcluded github.com/clevergo/clevergo

The author changed their mind and wants unexcluded
github.com/clevergo/clevergo back on the site.



Change-Id: I07a6c25dda1fb2861ca9553195cd4707f309e3a9
Reviewed-on: https://team-review.git.corp.google.com/c/golang/discovery/+/664075
CI-Result: Cloud Build <ea5729d4cf3392b9d382b6ca272c65aa27554f44@system.gserviceaccount.com>
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

golang/pkgsite,golang/pkgsite,golang/pkgsite,golang/pkgsite