[release-branch.go1.18] cmd/go: error out of 'go work use' if no directories are given

Otherwise, the behavior of 'go work use -r' (without arguments)
may be surprising.

For #51448.

Change-Id: I50cf1339591720ec5bd333146b89c9944ce420d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/389855


Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 4f809438)
Reviewed-on: https://go-review.googlesource.com/c/go/+/389299
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>