gopls/internal/regtest/workspace: disable flaky MultiModule_OneBrokenModule test

This is flaking trybots in the main repo.

For golang/go#44227.

Change-Id: I5b67dedf39462a7c028d890b52142b7d2269d220
Reviewed-on: https://go-review.googlesource.com/c/tools/+/291231
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>

gopls/internal/regtest/workspace/workspace_test.go

@@ -786,6 +786,9 @@ package exclude
 // Confirm that a fix for a tidy module will correct all modules in the
 // workspace.
 func TestMultiModule_OneBrokenModule(t *testing.T) {
+	if testing.Short() {
+		t.Skip("flaky test - golang.org/issue/44227")
+	}
 	testenv.NeedsGo1Point(t, 15)
 
 	const mod = `