Fix pagination not working with PK other than "id"

[gremo]

When you return the data in getList, you do:

// ...
const aggregateField = meta?.aggregateField ? meta.aggregateField : "id";

const total = await directusClient.request(
    aggregate(resource, {
        query: params,
        aggregate: {
            countDistinct: aggregateField,
        },
    })
);

return {
    data: response,
    total: total[0]?.countDistinct?.id ?? 0,
};

You correctly use aggregateField from meta when calling aggregate but you forgot to use it again in the return statement, so basically pagination won't work with PK other than "id".

This PR solve the issue.