Fix storybook / chromatic tests flakyness and integration tests (#11687)

## Storybook flakyness

### Actor Display image flakyness

<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/875c0738-5e31-4aba-9231-4ba5f78d1355"
/>

**Fix:** stop using a random usage

### Task Groups broken

<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/c67e47a1-a027-43f1-9601-68d61a8052b4"
/>

**Fix:** add missing TabListComponentInstance

## Flaky dates

Add https://github.com/k35o/storybook-addon-mock-date

## Integration tests

Fix broken tests due to relation refactoring

packages/twenty-server/test/integration/graphql/suites/search/search-resolver.integration-spec.ts

@@ -54,6 +54,7 @@ describe('SearchResolver', () => {
           },
         },
       });
+
       const listingObjectMetadata = objectsMetadata.find(
         (object) => object.nameSingular === LISTING_NAME_SINGULAR,
       );