Improve performance of theme report by calling the subaccounts with a recursive or GraphQL call

[jonespm]

When calling for new sub-accounts you can add the parameter recursive to save some API calls and improve performance. We may want to also look into using GraphQL and just getting all accounts first before processing which should speed up the playwright part.

Though it looks like with GraphQL you'd have to test a few subAccountsConnection so you don't know how deep you'd need to go to get all the subaccounts?

Might be worth looking into as the API calls seem to be where a lot of time is spent.