Move SR adapter into root (#7925)
Move SR adapter into root (#7925)

CoreFX creates SR in the System namespace. While putting the CoreCLR SR
adapter in the root may be unconventional, it allows us to keep the
shared code identical.
wtgodbe/coreclr,botaberg/coreclr,tijoytom/coreclr,hseok-oh/coreclr,wtgodbe/coreclr,cmckinsey/coreclr,yizhang82/coreclr,JosephTremoulet/coreclr,alexperovich/coreclr,jamesqo/coreclr,dpodder/coreclr,tijoytom/coreclr,ruben-ayrapetyan/coreclr,alexperovich/coreclr,krk/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,qiudesong/coreclr,russellhadley/coreclr,wtgodbe/coreclr,sagood/coreclr,cmckinsey/coreclr,pgavlin/coreclr,James-Ko/coreclr,pgavlin/coreclr,alexperovich/coreclr,James-Ko/coreclr,wtgodbe/coreclr,mmitche/coreclr,kyulee1/coreclr,parjong/coreclr,russellhadley/coreclr,James-Ko/coreclr,Dmitry-Me/coreclr,dpodder/coreclr,cshung/coreclr,yizhang82/coreclr,cshung/coreclr,rartemev/coreclr,rartemev/coreclr,yeaicc/coreclr,pgavlin/coreclr,cydhaselton/coreclr,gkhanna79/coreclr,cmckinsey/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,cmckinsey/coreclr,pgavlin/coreclr,krytarowski/coreclr,ruben-ayrapetyan/coreclr,ruben-ayrapetyan/coreclr,Dmitry-Me/coreclr,dpodder/coreclr,tijoytom/coreclr,poizan42/coreclr,mmitche/coreclr,sagood/coreclr,jamesqo/coreclr,poizan42/coreclr,krk/coreclr,cshung/coreclr,cshung/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,krytarowski/coreclr,botaberg/coreclr,mskvortsov/coreclr,neurospeech/coreclr,qiudesong/coreclr,pgavlin/coreclr,ruben-ayrapetyan/coreclr,botaberg/coreclr,botaberg/coreclr,ragmani/coreclr,neurospeech/coreclr,YongseopKim/coreclr,russellhadley/coreclr,parjong/coreclr,jamesqo/coreclr,sagood/coreclr,yeaicc/coreclr,yizhang82/coreclr,AlexGhiondea/coreclr,kyulee1/coreclr,parjong/coreclr,sjsinju/coreclr,yeaicc/coreclr,krytarowski/coreclr,neurospeech/coreclr,krytarowski/coreclr,Dmitry-Me/coreclr,rartemev/coreclr,JonHanna/coreclr,mskvortsov/coreclr,wateret/coreclr,James-Ko/coreclr,tijoytom/coreclr,qiudesong/coreclr,krk/coreclr,ragmani/coreclr,jamesqo/coreclr,gkhanna79/coreclr,cydhaselton/coreclr,mmitche/coreclr,mmitche/coreclr,yeaicc/coreclr,russellhadley/coreclr,JonHanna/coreclr,sjsinju/coreclr,YongseopKim/coreclr,AlexGhiondea/coreclr,ragmani/coreclr,wateret/coreclr,sjsinju/coreclr,sjsinju/coreclr,kyulee1/coreclr,sjsinju/coreclr,neurospeech/coreclr,cmckinsey/coreclr,yeaicc/coreclr,James-Ko/coreclr,YongseopKim/coreclr,dpodder/coreclr,James-Ko/coreclr,neurospeech/coreclr,JosephTremoulet/coreclr,qiudesong/coreclr,mmitche/coreclr,rartemev/coreclr,cydhaselton/coreclr,ragmani/coreclr,yeaicc/coreclr,JonHanna/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,krk/coreclr,JonHanna/coreclr,poizan42/coreclr,cydhaselton/coreclr,russellhadley/coreclr,kyulee1/coreclr,JosephTremoulet/coreclr,yizhang82/coreclr,alexperovich/coreclr,gkhanna79/coreclr,dpodder/coreclr,gkhanna79/coreclr,yizhang82/coreclr,russellhadley/coreclr,cydhaselton/coreclr,JosephTremoulet/coreclr,ragmani/coreclr,rartemev/coreclr,wateret/coreclr,parjong/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,sjsinju/coreclr,wateret/coreclr,cshung/coreclr,kyulee1/coreclr,tijoytom/coreclr,YongseopKim/coreclr,Dmitry-Me/coreclr,JonHanna/coreclr,AlexGhiondea/coreclr,jamesqo/coreclr,parjong/coreclr,pgavlin/coreclr,tijoytom/coreclr,dpodder/coreclr,sagood/coreclr,alexperovich/coreclr,gkhanna79/coreclr,hseok-oh/coreclr,Dmitry-Me/coreclr,JosephTremoulet/coreclr,YongseopKim/coreclr,mmitche/coreclr,jamesqo/coreclr,botaberg/coreclr,ragmani/coreclr,mskvortsov/coreclr,poizan42/coreclr,parjong/coreclr,cmckinsey/coreclr,JonHanna/coreclr,poizan42/coreclr,wateret/coreclr,mskvortsov/coreclr,alexperovich/coreclr,gkhanna79/coreclr,yizhang82/coreclr,cmckinsey/coreclr,Dmitry-Me/coreclr,cshung/coreclr,rartemev/coreclr,qiudesong/coreclr,kyulee1/coreclr,neurospeech/coreclr,yeaicc/coreclr,Dmitry-Me/coreclr,cydhaselton/coreclr,qiudesong/coreclr,krytarowski/coreclr,botaberg/coreclr,krk/coreclr,krk/coreclr,hseok-oh/coreclr,AlexGhiondea/coreclr,sagood/coreclr,ruben-ayrapetyan/coreclr,wtgodbe/coreclr,krytarowski/coreclr,wateret/coreclr,sagood/coreclr,hseok-oh/coreclr,ruben-ayrapetyan/coreclr