[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/project.json

@@ -162,7 +162,7 @@
       "options": {
         "cwd": "packages/twenty-server",
         "commands": [
-          "nx ts-node-no-deps -- ./scripts/generate-integration-tests/index.ts"
+          "nx ts-node-no-deps -- ./test/integration/graphql/codegen/index.ts"
         ],
         "parallel": false
       }