See how Boundary would look with gofumpt applied (#853)

* See how Boundary would look with https://github.com/mvdan/gofumpt applied

Results of running `gofumpt -w -s .`

* Update tools file and Makefile for gofumpt

Co-authored-by: Jeff Mitchell <jeffrey.mitchell@gmail.com>

internal/servers/controller/handler_test.go

@@ -186,7 +186,6 @@ func TestHandleImplementedPaths(t *testing.T) {
 	} {
 		for _, p := range paths {
 			t.Run(fmt.Sprintf("%s/%s", verb, p), func(t *testing.T) {
-
 				var expCode int
 				if !strings.HasPrefix(p, "v1/") {
 					sp := strings.Split(p, "_")