Update CoreFx, ProjectNTfs, ProjectNTfsTestILC to preview.19078.2, beta-27328-00, beta-27328-00, respectively (#34907)
Update CoreFx, ProjectNTfs, ProjectNTfsTestILC to preview.19078.2, beta-27328-00, beta-27328-00, respectively (#34907)


ptoonen/corefx,ericstj/corefx,wtgodbe/corefx,BrennanConroy/corefx,shimingsg/corefx,wtgodbe/corefx,ViktorHofer/corefx,ericstj/corefx,ptoonen/corefx,shimingsg/corefx,shimingsg/corefx,wtgodbe/corefx,ptoonen/corefx,ViktorHofer/corefx,wtgodbe/corefx,shimingsg/corefx,shimingsg/corefx,ericstj/corefx,ericstj/corefx,ericstj/corefx,ptoonen/corefx,wtgodbe/corefx,ericstj/corefx,wtgodbe/corefx,ericstj/corefx,shimingsg/corefx,BrennanConroy/corefx,ViktorHofer/corefx,ptoonen/corefx,ViktorHofer/corefx,ptoonen/corefx,shimingsg/corefx,ViktorHofer/corefx,ViktorHofer/corefx,wtgodbe/corefx,ptoonen/corefx,ViktorHofer/corefx,BrennanConroy/corefx