📱 [#724] Disable mobile-viewport test

When running tests using @storybook/test-runner, we need to apply
the same viewport to get the proper responsive elements as we
get in the real browser/storybook. However, we just ripped out
the viewport support because it's super flaky. So, we disable
these tests here, but they should still run on Chromatic so
we still get feedback there (provided we don't disable the
Chromatic snapshotting).

src/components/App.stories.jsx

@@ -403,7 +403,6 @@ export const SeveralStepsInMobileViewport = {
     accessibleToggleStepsLabel: 'Current step in form Formulier: Stap 2',
   },
   parameters: {
-    chromatic: {disableSnapshot: true}, // TODO: set up viewports in chromatic
     layout: 'fullscreen', // removes padding in canvas
     viewport: {
       defaultViewport: 'mobile1',

src/components/ProgressIndicator/ProgressIndicator.stories.jsx

@@ -68,8 +68,6 @@ export const Default = {};
 export const MobileViewport = {
   name: 'Mobile version',
   parameters: {
-    // TODO enable viewport in chromatic
-    chromatic: {disableSnapshot: true},
     viewport: {
       defaultViewport: 'mobile1',
     },
@@ -81,4 +79,5 @@ export const MobileViewport = {
     await expect(toggleButton).toHaveAttribute('aria-pressed', 'false');
     await userEvent.click(toggleButton);
   },
+  tags: ['!test'],
 };