Fix some broken tests that were expecting nil but are now getting an empty struct

internal/servers/controller/handlers/accounts/account_service_test.go

@@ -208,6 +208,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteAccountRequest{
 				Id: ac.GetPublicId(),
 			},
+			res:     &pbs.DeleteAccountResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/authmethods/authmethod_service_test.go

@@ -235,6 +235,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteAuthMethodRequest{
 				Id: am.GetPublicId(),
 			},
+			res:     &pbs.DeleteAuthMethodResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/authtokens/authtoken_service_test.go

@@ -220,6 +220,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteAuthTokenRequest{
 				Id: at.GetPublicId(),
 			},
+			res:     &pbs.DeleteAuthTokenResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/groups/group_service_test.go

@@ -297,6 +297,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteGroupRequest{
 				Id: og.GetPublicId(),
 			},
+			res:     &pbs.DeleteGroupResponse{},
 			errCode: codes.OK,
 		},
 		{
@@ -321,6 +322,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteGroupRequest{
 				Id: pg.GetPublicId(),
 			},
+			res:     &pbs.DeleteGroupResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/host_catalogs/host_catalog_service_test.go

@@ -238,6 +238,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteHostCatalogRequest{
 				Id: hc.GetPublicId(),
 			},
+			res:     &pbs.DeleteHostCatalogResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/host_sets/host_set_service_test.go

@@ -196,15 +196,16 @@ func TestDelete(t *testing.T) {
 		errCode codes.Code
 	}{
 		{
-			name:    "Delete an Existing Host",
+			name:    "Delete an Existing Host Set",
 			scopeId: proj.GetPublicId(),
 			req: &pbs.DeleteHostSetRequest{
 				Id: h.GetPublicId(),
 			},
+			res:     &pbs.DeleteHostSetResponse{},
 			errCode: codes.OK,
 		},
 		{
-			name:    "Delete bad id Host",
+			name:    "Delete bad id Host Set",
 			scopeId: proj.GetPublicId(),
 			req: &pbs.DeleteHostSetRequest{
 				Id: static.HostSetPrefix + "_doesntexis",
@@ -212,7 +213,7 @@ func TestDelete(t *testing.T) {
 			errCode: codes.NotFound,
 		},
 		{
-			name:    "Delete bad host catalog id in Host",
+			name:    "Delete bad host catalog id in Host Set",
 			scopeId: proj.GetPublicId(),
 			req: &pbs.DeleteHostSetRequest{
 				Id: h.GetPublicId(),

internal/servers/controller/handlers/hosts/host_service_test.go

@@ -197,6 +197,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteHostRequest{
 				Id: h.GetPublicId(),
 			},
+			res:     &pbs.DeleteHostResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/roles/role_service_test.go

@@ -273,6 +273,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteRoleRequest{
 				Id: or.GetPublicId(),
 			},
+			res:     &pbs.DeleteRoleResponse{},
 			errCode: codes.OK,
 		},
 		{
@@ -297,6 +298,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteRoleRequest{
 				Id: pr.GetPublicId(),
 			},
+			res:     &pbs.DeleteRoleResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/scopes/scope_service_test.go

@@ -304,6 +304,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteScopeRequest{
 				Id: proj.GetPublicId(),
 			},
+			res:     &pbs.DeleteScopeResponse{},
 			errCode: codes.OK,
 		},
 		{
@@ -328,6 +329,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteScopeRequest{
 				Id: org.GetPublicId(),
 			},
+			res:     &pbs.DeleteScopeResponse{},
 			errCode: codes.OK,
 		},
 		{

internal/servers/controller/handlers/targets/target_service_test.go

@@ -219,6 +219,7 @@ func TestDelete(t *testing.T) {
 			req: &pbs.DeleteTargetRequest{
 				Id: tar.GetPublicId(),
 			},
+			res:     &pbs.DeleteTargetResponse{},
 			errCode: codes.OK,
 		},
 		{