[release-branch.go1.13] cmd/go/internal/modload: annotate replacements in PackageNotInModuleError

Updates #34085
Fixes #34118

Change-Id: I3111f5997466ad33f51e80c71f5fb2ccebdcc6e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/193617


Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
(cherry picked from commit 8189a061)
Reviewed-on: https://go-review.googlesource.com/c/go/+/197317