devtools/drop_test_dbs.sh: add new test databases
devtools/drop_test_dbs.sh: add new test databases

Change-Id: Id5ae619fa5db665e70d3c60f6c86b856c1ec1528
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/293969
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>
Trust: Julie Qiu <8d32267b6b4884cf35adeaccde2b6857ae11aace@golang.org>

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