Make Debugger class static (#11439)
Make Debugger class static (#11439)

* Make Debugger class static

It's static in the .NET Standard and .NET Core refs, and in CoreRT's
implementation, so make it static in the CoreCLR implementation as well.
Also, minor cleanup while making changes here.
sagood/coreclr,AlexGhiondea/coreclr,krk/coreclr,gkhanna79/coreclr,poizan42/coreclr,parjong/coreclr,cydhaselton/coreclr,parjong/coreclr,yeaicc/coreclr,rartemev/coreclr,pgavlin/coreclr,parjong/coreclr,dpodder/coreclr,poizan42/coreclr,wtgodbe/coreclr,ruben-ayrapetyan/coreclr,krk/coreclr,AlexGhiondea/coreclr,poizan42/coreclr,mskvortsov/coreclr,ruben-ayrapetyan/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,rartemev/coreclr,kyulee1/coreclr,mmitche/coreclr,russellhadley/coreclr,krytarowski/coreclr,wtgodbe/coreclr,gkhanna79/coreclr,ruben-ayrapetyan/coreclr,YongseopKim/coreclr,ragmani/coreclr,mskvortsov/coreclr,dpodder/coreclr,ruben-ayrapetyan/coreclr,parjong/coreclr,cydhaselton/coreclr,mskvortsov/coreclr,sagood/coreclr,krk/coreclr,JonHanna/coreclr,mskvortsov/coreclr,yizhang82/coreclr,poizan42/coreclr,botaberg/coreclr,mmitche/coreclr,krytarowski/coreclr,tijoytom/coreclr,cydhaselton/coreclr,cshung/coreclr,pgavlin/coreclr,rartemev/coreclr,YongseopKim/coreclr,cshung/coreclr,rartemev/coreclr,dpodder/coreclr,cydhaselton/coreclr,gkhanna79/coreclr,JonHanna/coreclr,yizhang82/coreclr,botaberg/coreclr,tijoytom/coreclr,tijoytom/coreclr,wateret/coreclr,russellhadley/coreclr,botaberg/coreclr,mskvortsov/coreclr,JonHanna/coreclr,sagood/coreclr,yeaicc/coreclr,AlexGhiondea/coreclr,wateret/coreclr,yizhang82/coreclr,poizan42/coreclr,yeaicc/coreclr,krytarowski/coreclr,pgavlin/coreclr,pgavlin/coreclr,ragmani/coreclr,JonHanna/coreclr,parjong/coreclr,rartemev/coreclr,YongseopKim/coreclr,botaberg/coreclr,hseok-oh/coreclr,AlexGhiondea/coreclr,botaberg/coreclr,wtgodbe/coreclr,hseok-oh/coreclr,AlexGhiondea/coreclr,kyulee1/coreclr,krytarowski/coreclr,wateret/coreclr,krk/coreclr,parjong/coreclr,kyulee1/coreclr,cshung/coreclr,JosephTremoulet/coreclr,kyulee1/coreclr,mmitche/coreclr,JonHanna/coreclr,kyulee1/coreclr,qiudesong/coreclr,mmitche/coreclr,hseok-oh/coreclr,mmitche/coreclr,pgavlin/coreclr,yizhang82/coreclr,yizhang82/coreclr,JosephTremoulet/coreclr,tijoytom/coreclr,tijoytom/coreclr,qiudesong/coreclr,yeaicc/coreclr,cydhaselton/coreclr,JosephTremoulet/coreclr,krk/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,yeaicc/coreclr,gkhanna79/coreclr,sagood/coreclr,qiudesong/coreclr,qiudesong/coreclr,pgavlin/coreclr,russellhadley/coreclr,hseok-oh/coreclr,ragmani/coreclr,cshung/coreclr,JosephTremoulet/coreclr,ragmani/coreclr,ruben-ayrapetyan/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,JonHanna/coreclr,ragmani/coreclr,dpodder/coreclr,JosephTremoulet/coreclr,botaberg/coreclr,cshung/coreclr,sagood/coreclr,tijoytom/coreclr,YongseopKim/coreclr,wateret/coreclr,gkhanna79/coreclr,qiudesong/coreclr,wateret/coreclr,rartemev/coreclr,dpodder/coreclr,cydhaselton/coreclr,yeaicc/coreclr,krytarowski/coreclr,yizhang82/coreclr,krytarowski/coreclr,russellhadley/coreclr,russellhadley/coreclr,sagood/coreclr,AlexGhiondea/coreclr,dpodder/coreclr,ragmani/coreclr,wtgodbe/coreclr,wateret/coreclr,cshung/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,gkhanna79/coreclr,mmitche/coreclr,qiudesong/coreclr,ruben-ayrapetyan/coreclr,russellhadley/coreclr,yeaicc/coreclr,krk/coreclr,kyulee1/coreclr,mskvortsov/coreclr