Fix createdBy and activity tests

[thomtrp]

As title

[Weiko]

LGTM, could use "fragments" (mocks) for composite fields but it's not really important 👍

[greptile-apps]

PR Summary

The pull request updates various test files and mock data to align with changes in GraphQL mutations and object structures, particularly focusing on the 'createdBy' field and activity hooks.

• /packages/twenty-front/src/modules/activities/hooks/__tests__/useCreateActivityInDB.test.tsx: Updated mutation from createActivity to createTask to reflect application changes.
• /packages/twenty-front/src/modules/activities/tasks/hooks/__tests__/useCompleteTask.test.tsx: Mutation now targets updateTask instead of updateActivity, ensuring task status updates correctly.
• /packages/twenty-front/src/modules/favorites/hooks/__mocks__/useFavorites.ts: Expanded mock data and mutations to include detailed fields like taskId, workspaceMemberId, and nested objects.
• /packages/twenty-front/src/modules/object-record/hooks/__mocks__/useCreateManyRecords.ts: Added fields such as updatedAt, myCustomObjectId, and createdBy in the mutation for creating people records.
• /packages/twenty-front/src/modules/object-record/hooks/__mocks__/useCreateOneRecord.ts: Expanded mutation CreateOnePerson to include additional fields like whatsapp, linkedinLink, and performanceRating.

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[Weiko]

LGTM