[release-branch.go1.21] Revert "go/types, types2: don't do version checks for embedded types of imported interfaces"
This reverts CL 571075.
Reason for revert: We might want to do a security-only minor release. Back off the release branch to a clean state from the previous minor release. Sorry for the inconvenience.
Change-Id: Ifc8c7e00e6faea3aa547b883eed44180ddb447de
Reviewed-on: https://go-review.googlesource.com/c/go/+/571355
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Robert Findley <rfindley@google.com>