Fixes https://github.com/twentyhq/twenty/issues/11864 and https://github.com/twentyhq/core-team-issues/issues/908 We should not send `createManyXXX` mutations with FE-forged ids in the payload if we want to do an upsert, because that 1) prevents records from being merged 2) triggers optimistic rendering while we can't know before-hand which records will actually be created and which records will only be updated Also noticed createdBy was being overriden even for records we are updating and not creating, which did not seem right, so fixed that too