Fix CI errored tasks for front (#6806)

In this PR:
- revert de-optimization of icons bundle for storybook. This was forcing
the browser to load ~3k files while running stories
- adding lazy loading on Settings route to improve developer experience
(some files will be loaded later)
- fix FE tests: unit, modules stories, pages stories

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/pages/settings/data-model/__stories__/SettingsObjectEdit.stories.tsx

@@ -34,6 +34,6 @@ export const StandardObject: Story = {
 
 export const CustomObject: Story = {
   args: {
-    routeParams: { ':objectSlug': 'listings' },
+    routeParams: { ':objectSlug': 'my-custom-objects' },
   },
 };

packages/twenty-front/src/pages/settings/data-model/__stories__/SettingsObjectNewField/SettingsObjectNewFieldStep2.stories.tsx

@@ -30,7 +30,6 @@ export type Story = StoryObj<typeof SettingsObjectNewFieldStep2>;
 export const Default: Story = {
   play: async ({ canvasElement }) => {
     const canvas = within(canvasElement);
-    await canvas.findByText('Settings');
     await canvas.findByText('Objects');
     await canvas.findByText('Name and description');
 

packages/twenty-front/src/pages/settings/data-model/__stories__/SettingsObjects.stories.tsx

@@ -6,7 +6,6 @@ import {
   PageDecoratorArgs,
 } from '~/testing/decorators/PageDecorator';
 import { graphqlMocks } from '~/testing/graphqlMocks';
-import { sleep } from '~/utils/sleep';
 
 import { SettingsObjects } from '../SettingsObjects';
 
@@ -28,11 +27,6 @@ export const Default: Story = {
   play: async ({ canvasElement }) => {
     const canvas = within(canvasElement);
 
-    await sleep(1000);
-
-    await canvas.getByRole('heading', {
-      level: 2,
-      name: 'Objects',
-    });
+    await canvas.findByText('Existing objects', undefined, { timeout: 5000 });
   },
 };