[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/integration/graphql/utils/delete-many-operation-factory.util.ts

@@ -0,0 +1,30 @@
+import gql from 'graphql-tag';
+
+import { capitalize } from 'src/utils/capitalize';
+
+type DeleteManyOperationFactoryParams = {
+  objectMetadataSingularName: string;
+  objectMetadataPluralName: string;
+  gqlFields: string;
+  filter?: object;
+};
+
+export const deleteManyOperationFactory = ({
+  objectMetadataSingularName,
+  objectMetadataPluralName,
+  gqlFields,
+  filter = {},
+}: DeleteManyOperationFactoryParams) => ({
+  query: gql`
+    mutation Delete${capitalize(objectMetadataPluralName)}(
+      $filter: ${capitalize(objectMetadataSingularName)}FilterInput
+    ) {
+      delete${capitalize(objectMetadataPluralName)}(filter: $filter) {
+        ${gqlFields}
+      }
+  }
+  `,
+  variables: {
+    filter,
+  },
+});