As of CL 189818, bundle has been updated to use the go/packages API to
load packages. That API supports module mode and legacy GOPATH mode.
Update the test to provide coverage for all modes.
Updates golang/go#24661.
Change-Id: Ied6196f7317b9b0289faf80dbfe9815e9b98b55d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/255053
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>