Add tests to exercise sbyte string constructors with invalid UTF8 characters on Unix (#27789)
Add tests to exercise sbyte string constructors with invalid UTF8 characters on Unix (#27789)


wtgodbe/corefx,ericstj/corefx,shimingsg/corefx,Jiayili1/corefx,ericstj/corefx,BrennanConroy/corefx,ptoonen/corefx,ViktorHofer/corefx,ptoonen/corefx,wtgodbe/corefx,ptoonen/corefx,ericstj/corefx,mmitche/corefx,wtgodbe/corefx,shimingsg/corefx,Jiayili1/corefx,Jiayili1/corefx,mmitche/corefx,ptoonen/corefx,mmitche/corefx,wtgodbe/corefx,wtgodbe/corefx,mmitche/corefx,shimingsg/corefx,ViktorHofer/corefx,Jiayili1/corefx,BrennanConroy/corefx,ViktorHofer/corefx,wtgodbe/corefx,ViktorHofer/corefx,ericstj/corefx,mmitche/corefx,ViktorHofer/corefx,ViktorHofer/corefx,mmitche/corefx,mmitche/corefx,ViktorHofer/corefx,ptoonen/corefx,shimingsg/corefx,ptoonen/corefx,ericstj/corefx,wtgodbe/corefx,Jiayili1/corefx,Jiayili1/corefx,shimingsg/corefx,Jiayili1/corefx,shimingsg/corefx,ericstj/corefx,BrennanConroy/corefx,shimingsg/corefx,ericstj/corefx,ptoonen/corefx