Move getOrgFullScan to streamOrgFullScan and getOrgFullScanBuffered

[pvdz]

The getOrgFullScan is a bit of a misnomer, especially since the rest doesn't stream the data.

I'm moving the method to streamOrgFullScan and deprecating the old method.

Additionally, adding a new method getOrgFullScanBuffere, which should make the distinction clear and not risk a sort of rug pull.

We deprecate the old method and in some major we can complete the swap, or just drop it and leave it like this.