I think they will be just an unsired vampire because resurrection will sever the link between the vampire and their original sire. Think of Alaric after being resurrected in the TVD Season 5 finale: He was essentially unkillable (with some exceptions of course like the anti-magic barrier and the cure) because his link to Elena was severed since she technically was already dead. So I think it’ll basically be the same thing here.

An unsired vampire is conditional on a vampire's creation. I.e. the only unsired 'vampire' was Hayley when she was turned via Hope's blood because Hope is not a 'vampire'. A resurrected vampire is still sired. (See Siring). They would either be killed because of the Sireline spell (because their Original is dead) or unaffected, likely the former given the workings of the spell. Alaric isn't directly applicable since he was created as an Original, and not a sired vampire.