chore: app_test.go: New->NewForTest (#1004)

The tests that cover error cases for private provides were using
New(opts...) rather than NewForTest(t, opts...) which caused the error
logs to be present in the tests when those tests run.

This changes those to use NewForTest instead.

app_test.go

@@ -401,7 +401,7 @@ func TestPrivateProvide(t *testing.T) {
 	t.Run("CantUsePrivateFromSubModule", func(t *testing.T) {
 		t.Parallel()
 
-		app := New(
+		app := NewForTest(t,
 			Module("SubModule", Provide(func() int { return 0 }, Private)),
 			Invoke(func(a int) {}),
 		)
@@ -447,7 +447,7 @@ func TestPrivateProvideWithDecorators(t *testing.T) {
 			if private {
 				provideOpts = append(provideOpts, Private)
 			}
-			app := New(
+			app := NewForTest(t,
 				Module("SubModule",
 					Provide(provideOpts...),
 					Decorate(func(a int) int { return a + 2 }),
@@ -500,7 +500,7 @@ func TestPrivateProvideWithDecorators(t *testing.T) {
 	t.Run("CannotDecoratePrivateChildType", func(t *testing.T) {
 		t.Parallel()
 
-		app := New(
+		app := NewForTest(t,
 			Module("Child",
 				Provide(func() int { return 0 }, Private),
 			),