first_attempt as a group by is getting added internally in the queries as it is required by the new PaymentIntent based metrics for Analytics V2 Dashboard.

The logic was added for the existing older metrics as well for PaymentIntents on the older dashboard, and is failing when using sqlx as the Pool.

Need to remove the logic for adding first_attempt as a group_by in the older metrics, and also tweak the manner in which this is getting added as a group_by in the new metrics.