Gazelle: add a few more integration tests (#696)
Gazelle: add a few more integration tests (#696)

Also removed go_prefix-related items from the TODO list, as we don't
plan to support the current behavior in the future.
Xjs/rules_go,Xjs/rules_go,bazelbuild/rules_go,Xjs/rules_go,bazelbuild/rules_go,bazelbuild/rules_go,bazelbuild/rules_go,Xjs/rules_go,Xjs/rules_go,bazelbuild/rules_go