Add support for alternative date search params

[mattolson]

According to the API documentation, there are several ways to conduct a date search on transaction collections, but only one is supported in the OpenAPI definition.

For example, in List Transactions By Account, the docs say that you can use from_created_at and to_created_at as well as from_updated_at and to_updated_at in addition to the older from_date and to_date. from_date and to_date are in the OpenAPI doc, but the others are not. This means that generated clients can't use these additional params.

I see the same for all the transaction collection endpoints, so all of them need to be updated here.