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/gen/controller/api/services/session_service_grpc.pb.go

@@ -4,6 +4,7 @@ package services
 
 import (
 	context "context"
+
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
@@ -90,15 +91,16 @@ type SessionServiceServer interface {
 }
 
 // UnimplementedSessionServiceServer must be embedded to have forward compatible implementations.
-type UnimplementedSessionServiceServer struct {
-}
+type UnimplementedSessionServiceServer struct{}
 
 func (UnimplementedSessionServiceServer) GetSession(context.Context, *GetSessionRequest) (*GetSessionResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetSession not implemented")
 }
+
 func (UnimplementedSessionServiceServer) ListSessions(context.Context, *ListSessionsRequest) (*ListSessionsResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ListSessions not implemented")
 }
+
 func (UnimplementedSessionServiceServer) CancelSession(context.Context, *CancelSessionRequest) (*CancelSessionResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method CancelSession not implemented")
 }