[Server Integration tests] Enrich integration GraphQL API tests (#7699)

### Description

- We are using gql instead of strings to be able to see the graphql code
highlighted

### Demo


![](https://assets-service.gitstart.com/28455/d06016b9-c62c-4e0d-bb16-3d7dd42c5b6b.png)

Fixes #7526

---------

Co-authored-by: gitstart-twenty <gitstart-twenty@users.noreply.github.com>
Co-authored-by: Charles Bochet <charles@twenty.com>
Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

packages/twenty-server/test/utils/create-app.ts

@@ -1,45 +0,0 @@
-import { NestExpressApplication } from '@nestjs/platform-express';
-import { Test, TestingModule, TestingModuleBuilder } from '@nestjs/testing';
-
-import { AppModule } from 'src/app.module';
-
-interface TestingModuleCreatePreHook {
-  (moduleBuilder: TestingModuleBuilder): TestingModuleBuilder;
-}
-
-/**
- * Hook for adding items to nest application
- */
-export type TestingAppCreatePreHook = (
-  app: NestExpressApplication,
-) => Promise<void>;
-
-/**
- * Sets basic integration testing module of app
- */
-export const createApp = async (
-  config: {
-    moduleBuilderHook?: TestingModuleCreatePreHook;
-    appInitHook?: TestingAppCreatePreHook;
-  } = {},
-): Promise<NestExpressApplication> => {
-  let moduleBuilder: TestingModuleBuilder = Test.createTestingModule({
-    imports: [AppModule],
-  });
-
-  if (config.moduleBuilderHook) {
-    moduleBuilder = config.moduleBuilderHook(moduleBuilder);
-  }
-
-  const moduleFixture: TestingModule = await moduleBuilder.compile();
-
-  const app = moduleFixture.createNestApplication<NestExpressApplication>();
-
-  if (config.appInitHook) {
-    await config.appInitHook(app);
-  }
-
-  await app.init();
-
-  return app;
-};

packages/twenty-server/test/utils/setup-test.ts

@@ -1,16 +0,0 @@
-import { JestConfigWithTsJest } from 'ts-jest';
-import 'tsconfig-paths/register';
-
-import { createApp } from './create-app';
-
-export default async (_, projectConfig: JestConfigWithTsJest) => {
-  const app = await createApp({});
-
-  if (!projectConfig.globals) {
-    throw new Error('No globals found in project config');
-  }
-
-  await app.listen(projectConfig.globals.APP_PORT);
-
-  global.app = app;
-};

packages/twenty-server/test/utils/teardown-test.ts

@@ -1,5 +0,0 @@
-import 'tsconfig-paths/register';
-
-export default async () => {
-  global.app.close();
-};