FileStream.Unix: open with CLOEXEC unless FileShare.Inheritable set (#10251)
FileStream.Unix: open with CLOEXEC unless FileShare.Inheritable set (#10251)

* FileStream.Unix: open with CLOEXEC unless FileShare.Inheritable set

* PR feedback

krytarowski/coreclr,yizhang82/coreclr,AlexGhiondea/coreclr,poizan42/coreclr,cydhaselton/coreclr,cmckinsey/coreclr,cydhaselton/coreclr,JonHanna/coreclr,rartemev/coreclr,ruben-ayrapetyan/coreclr,alexperovich/coreclr,wtgodbe/coreclr,ragmani/coreclr,wtgodbe/coreclr,pgavlin/coreclr,cmckinsey/coreclr,parjong/coreclr,JosephTremoulet/coreclr,tijoytom/coreclr,YongseopKim/coreclr,russellhadley/coreclr,hseok-oh/coreclr,mskvortsov/coreclr,cshung/coreclr,sagood/coreclr,tijoytom/coreclr,yizhang82/coreclr,rartemev/coreclr,krytarowski/coreclr,ruben-ayrapetyan/coreclr,yeaicc/coreclr,yizhang82/coreclr,cshung/coreclr,James-Ko/coreclr,alexperovich/coreclr,JonHanna/coreclr,hseok-oh/coreclr,JosephTremoulet/coreclr,rartemev/coreclr,JosephTremoulet/coreclr,dpodder/coreclr,krk/coreclr,JonHanna/coreclr,russellhadley/coreclr,pgavlin/coreclr,sagood/coreclr,parjong/coreclr,mskvortsov/coreclr,YongseopKim/coreclr,krytarowski/coreclr,parjong/coreclr,dpodder/coreclr,sagood/coreclr,qiudesong/coreclr,wateret/coreclr,James-Ko/coreclr,yeaicc/coreclr,mmitche/coreclr,JosephTremoulet/coreclr,JosephTremoulet/coreclr,parjong/coreclr,ragmani/coreclr,AlexGhiondea/coreclr,ruben-ayrapetyan/coreclr,cshung/coreclr,alexperovich/coreclr,YongseopKim/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,qiudesong/coreclr,sagood/coreclr,mskvortsov/coreclr,ruben-ayrapetyan/coreclr,pgavlin/coreclr,pgavlin/coreclr,yeaicc/coreclr,rartemev/coreclr,hseok-oh/coreclr,wateret/coreclr,gkhanna79/coreclr,poizan42/coreclr,rartemev/coreclr,qiudesong/coreclr,krytarowski/coreclr,AlexGhiondea/coreclr,jamesqo/coreclr,kyulee1/coreclr,krk/coreclr,wateret/coreclr,krk/coreclr,JosephTremoulet/coreclr,kyulee1/coreclr,cmckinsey/coreclr,parjong/coreclr,mskvortsov/coreclr,JonHanna/coreclr,qiudesong/coreclr,pgavlin/coreclr,ragmani/coreclr,gkhanna79/coreclr,yeaicc/coreclr,JonHanna/coreclr,yizhang82/coreclr,AlexGhiondea/coreclr,botaberg/coreclr,gkhanna79/coreclr,cmckinsey/coreclr,hseok-oh/coreclr,cmckinsey/coreclr,cydhaselton/coreclr,mskvortsov/coreclr,russellhadley/coreclr,mmitche/coreclr,ragmani/coreclr,hseok-oh/coreclr,poizan42/coreclr,krytarowski/coreclr,mmitche/coreclr,russellhadley/coreclr,poizan42/coreclr,dpodder/coreclr,krytarowski/coreclr,poizan42/coreclr,kyulee1/coreclr,yeaicc/coreclr,mskvortsov/coreclr,gkhanna79/coreclr,wateret/coreclr,gkhanna79/coreclr,YongseopKim/coreclr,dpodder/coreclr,jamesqo/coreclr,mmitche/coreclr,jamesqo/coreclr,kyulee1/coreclr,ragmani/coreclr,James-Ko/coreclr,AlexGhiondea/coreclr,cshung/coreclr,botaberg/coreclr,JonHanna/coreclr,parjong/coreclr,YongseopKim/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,yeaicc/coreclr,russellhadley/coreclr,wateret/coreclr,botaberg/coreclr,yizhang82/coreclr,yizhang82/coreclr,tijoytom/coreclr,cmckinsey/coreclr,alexperovich/coreclr,alexperovich/coreclr,cshung/coreclr,tijoytom/coreclr,gkhanna79/coreclr,qiudesong/coreclr,sagood/coreclr,qiudesong/coreclr,cmckinsey/coreclr,James-Ko/coreclr,mmitche/coreclr,krk/coreclr,rartemev/coreclr,cydhaselton/coreclr,botaberg/coreclr,cydhaselton/coreclr,yeaicc/coreclr,sagood/coreclr,ruben-ayrapetyan/coreclr,dpodder/coreclr,AlexGhiondea/coreclr,cydhaselton/coreclr,kyulee1/coreclr,dpodder/coreclr,ragmani/coreclr,krk/coreclr,krk/coreclr,tijoytom/coreclr,pgavlin/coreclr,cshung/coreclr,mmitche/coreclr,poizan42/coreclr,alexperovich/coreclr,botaberg/coreclr,kyulee1/coreclr,jamesqo/coreclr,jamesqo/coreclr,wtgodbe/coreclr,botaberg/coreclr,tijoytom/coreclr,James-Ko/coreclr,russellhadley/coreclr,ruben-ayrapetyan/coreclr,wateret/coreclr,jamesqo/coreclr,James-Ko/coreclr,hseok-oh/coreclr