cmd/go: fail fast across packages
Fixes #33038
Change-Id: I0b70c450be1c1cc59ddc1f3fddad227deccc7e14
GitHub-Last-Rev:
302ebd648afb4a5fc9ca0ae10cda5c58f2d64120
GitHub-Pull-Request: golang/go#62714
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-race,gotip-windows-amd64-race,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/529198
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>