Update JIT's ArenaAllocator comments
Update JIT's ArenaAllocator comments

A recent allocator refactoring changed function and class names but the old names were still referenced in a comment.

bartdesmet/coreclr,AlexGhiondea/coreclr,kyulee1/coreclr,YongseopKim/coreclr,jhendrixMSFT/coreclr,sagood/coreclr,andschwa/coreclr,YongseopKim/coreclr,alexperovich/coreclr,qiudesong/coreclr,James-Ko/coreclr,Dmitry-Me/coreclr,cydhaselton/coreclr,wkchoy74/coreclr,neurospeech/coreclr,JonHanna/coreclr,kyulee1/coreclr,LLITCHEV/coreclr,yizhang82/coreclr,chuck-mitchell/coreclr,gkhanna79/coreclr,naamunds/coreclr,James-Ko/coreclr,russellhadley/coreclr,naamunds/coreclr,rartemev/coreclr,yeaicc/coreclr,yeaicc/coreclr,Lucrecious/coreclr,ramarag/coreclr,ramarag/coreclr,swgillespie/coreclr,poizan42/coreclr,andschwa/coreclr,LLITCHEV/coreclr,bartonjs/coreclr,schellap/coreclr,JonHanna/coreclr,JosephTremoulet/coreclr,krytarowski/coreclr,ZhichengZhu/coreclr,LLITCHEV/coreclr,wateret/coreclr,naamunds/coreclr,jamesqo/coreclr,wkchoy74/coreclr,naamunds/coreclr,krk/coreclr,YongseopKim/coreclr,alexperovich/coreclr,cydhaselton/coreclr,Dmitry-Me/coreclr,shahid-pk/coreclr,yeaicc/coreclr,sperling/coreclr,pgavlin/coreclr,josteink/coreclr,pgavlin/coreclr,dpodder/coreclr,jamesqo/coreclr,martinwoodward/coreclr,ragmani/coreclr,schellap/coreclr,wateret/coreclr,benpye/coreclr,gkhanna79/coreclr,benpye/coreclr,manu-silicon/coreclr,cshung/coreclr,dpodder/coreclr,sagood/coreclr,kyulee1/coreclr,dasMulli/coreclr,tijoytom/coreclr,swgillespie/coreclr,naamunds/coreclr,cmckinsey/coreclr,martinwoodward/coreclr,wtgodbe/coreclr,poizan42/coreclr,mmitche/coreclr,jamesqo/coreclr,martinwoodward/coreclr,poizan42/coreclr,yizhang82/coreclr,sperling/coreclr,tijoytom/coreclr,ruben-ayrapetyan/coreclr,AlexGhiondea/coreclr,yizhang82/coreclr,Dmitry-Me/coreclr,JosephTremoulet/coreclr,JonHanna/coreclr,manu-silicon/coreclr,bartdesmet/coreclr,KrzysztofCwalina/coreclr,benpye/coreclr,jhendrixMSFT/coreclr,SlavaRa/coreclr,James-Ko/coreclr,jamesqo/coreclr,mskvortsov/coreclr,cydhaselton/coreclr,manu-silicon/coreclr,wateret/coreclr,naamunds/coreclr,Godin/coreclr,josteink/coreclr,Lucrecious/coreclr,krytarowski/coreclr,benpye/coreclr,ZhichengZhu/coreclr,andschwa/coreclr,cshung/coreclr,swgillespie/coreclr,Godin/coreclr,alexperovich/coreclr,AlexGhiondea/coreclr,Dmitry-Me/coreclr,botaberg/coreclr,AlexGhiondea/coreclr,wkchoy74/coreclr,cmckinsey/coreclr,dasMulli/coreclr,JonHanna/coreclr,neurospeech/coreclr,andschwa/coreclr,andschwa/coreclr,poizan42/coreclr,jhendrixMSFT/coreclr,rartemev/coreclr,martinwoodward/coreclr,botaberg/coreclr,yizhang82/coreclr,dpodder/coreclr,pgavlin/coreclr,gkhanna79/coreclr,ramarag/coreclr,cshung/coreclr,LLITCHEV/coreclr,roncain/coreclr,Dmitry-Me/coreclr,josteink/coreclr,James-Ko/coreclr,schellap/coreclr,SlavaRa/coreclr,parjong/coreclr,krk/coreclr,pgavlin/coreclr,Lucrecious/coreclr,LLITCHEV/coreclr,KrzysztofCwalina/coreclr,JosephTremoulet/coreclr,ZhichengZhu/coreclr,sagood/coreclr,russellhadley/coreclr,josteink/coreclr,poizan42/coreclr,pgavlin/coreclr,Lucrecious/coreclr,cshung/coreclr,botaberg/coreclr,roncain/coreclr,sjsinju/coreclr,Lucrecious/coreclr,rartemev/coreclr,gkhanna79/coreclr,ramarag/coreclr,yizhang82/coreclr,cydhaselton/coreclr,shahid-pk/coreclr,hseok-oh/coreclr,dasMulli/coreclr,Dmitry-Me/coreclr,jamesqo/coreclr,naamunds/coreclr,roncain/coreclr,martinwoodward/coreclr,mmitche/coreclr,wkchoy74/coreclr,mmitche/coreclr,tijoytom/coreclr,JonHanna/coreclr,SlavaRa/coreclr,kyulee1/coreclr,ramarag/coreclr,russellhadley/coreclr,parjong/coreclr,poizan42/coreclr,wkchoy74/coreclr,chuck-mitchell/coreclr,vinnyrom/coreclr,alexperovich/coreclr,parjong/coreclr,James-Ko/coreclr,mmitche/coreclr,bartonjs/coreclr,krk/coreclr,manu-silicon/coreclr,qiudesong/coreclr,mskvortsov/coreclr,shahid-pk/coreclr,KrzysztofCwalina/coreclr,chuck-mitchell/coreclr,manu-silicon/coreclr,sejongoh/coreclr,schellap/coreclr,bartdesmet/coreclr,cshung/coreclr,yeaicc/coreclr,cydhaselton/coreclr,sejongoh/coreclr,pgavlin/coreclr,JosephTremoulet/coreclr,ragmani/coreclr,bartonjs/coreclr,hseok-oh/coreclr,bartonjs/coreclr,sjsinju/coreclr,ramarag/coreclr,wateret/coreclr,wateret/coreclr,botaberg/coreclr,mskvortsov/coreclr,martinwoodward/coreclr,neurospeech/coreclr,AlexGhiondea/coreclr,Dmitry-Me/coreclr,YongseopKim/coreclr,qiudesong/coreclr,sejongoh/coreclr,AlexGhiondea/coreclr,russellhadley/coreclr,parjong/coreclr,parjong/coreclr,cmckinsey/coreclr,Godin/coreclr,sperling/coreclr,vinnyrom/coreclr,sperling/coreclr,rartemev/coreclr,cmckinsey/coreclr,Lucrecious/coreclr,russellhadley/coreclr,krk/coreclr,ruben-ayrapetyan/coreclr,yizhang82/coreclr,jhendrixMSFT/coreclr,martinwoodward/coreclr,Godin/coreclr,dasMulli/coreclr,ZhichengZhu/coreclr,bartdesmet/coreclr,chuck-mitchell/coreclr,dasMulli/coreclr,sjsinju/coreclr,ramarag/coreclr,vinnyrom/coreclr,mskvortsov/coreclr,swgillespie/coreclr,andschwa/coreclr,alexperovich/coreclr,dpodder/coreclr,mmitche/coreclr,krk/coreclr,YongseopKim/coreclr,bartdesmet/coreclr,KrzysztofCwalina/coreclr,wtgodbe/coreclr,shahid-pk/coreclr,ZhichengZhu/coreclr,shahid-pk/coreclr,tijoytom/coreclr,cmckinsey/coreclr,sagood/coreclr,sperling/coreclr,gkhanna79/coreclr,sagood/coreclr,wtgodbe/coreclr,roncain/coreclr,wateret/coreclr,manu-silicon/coreclr,qiudesong/coreclr,bartonjs/coreclr,jhendrixMSFT/coreclr,ragmani/coreclr,vinnyrom/coreclr,rartemev/coreclr,sperling/coreclr,schellap/coreclr,ruben-ayrapetyan/coreclr,dasMulli/coreclr,schellap/coreclr,roncain/coreclr,tijoytom/coreclr,dpodder/coreclr,bartdesmet/coreclr,yeaicc/coreclr,Godin/coreclr,SlavaRa/coreclr,krytarowski/coreclr,Lucrecious/coreclr,andschwa/coreclr,JosephTremoulet/coreclr,benpye/coreclr,JonHanna/coreclr,cmckinsey/coreclr,LLITCHEV/coreclr,sejongoh/coreclr,JosephTremoulet/coreclr,vinnyrom/coreclr,KrzysztofCwalina/coreclr,botaberg/coreclr,schellap/coreclr,bartonjs/coreclr,Godin/coreclr,dasMulli/coreclr,swgillespie/coreclr,tijoytom/coreclr,wkchoy74/coreclr,benpye/coreclr,alexperovich/coreclr,dpodder/coreclr,sjsinju/coreclr,cmckinsey/coreclr,Godin/coreclr,gkhanna79/coreclr,bartdesmet/coreclr,qiudesong/coreclr,ruben-ayrapetyan/coreclr,swgillespie/coreclr,chuck-mitchell/coreclr,mskvortsov/coreclr,hseok-oh/coreclr,krk/coreclr,wkchoy74/coreclr,sejongoh/coreclr,ragmani/coreclr,rartemev/coreclr,mmitche/coreclr,josteink/coreclr,krytarowski/coreclr,jhendrixMSFT/coreclr,shahid-pk/coreclr,ruben-ayrapetyan/coreclr,swgillespie/coreclr,botaberg/coreclr,russellhadley/coreclr,parjong/coreclr,cshung/coreclr,wtgodbe/coreclr,hseok-oh/coreclr,ZhichengZhu/coreclr,neurospeech/coreclr,sperling/coreclr,hseok-oh/coreclr,cydhaselton/coreclr,vinnyrom/coreclr,chuck-mitchell/coreclr,qiudesong/coreclr,ragmani/coreclr,mskvortsov/coreclr,yeaicc/coreclr,kyulee1/coreclr,hseok-oh/coreclr,sejongoh/coreclr,manu-silicon/coreclr,vinnyrom/coreclr,ruben-ayrapetyan/coreclr,jhendrixMSFT/coreclr,SlavaRa/coreclr,James-Ko/coreclr,SlavaRa/coreclr,bartonjs/coreclr,neurospeech/coreclr,jamesqo/coreclr,roncain/coreclr,KrzysztofCwalina/coreclr,LLITCHEV/coreclr,ragmani/coreclr,KrzysztofCwalina/coreclr,krytarowski/coreclr,josteink/coreclr,ZhichengZhu/coreclr,roncain/coreclr,sejongoh/coreclr,wtgodbe/coreclr,yeaicc/coreclr,kyulee1/coreclr,shahid-pk/coreclr,chuck-mitchell/coreclr,benpye/coreclr,neurospeech/coreclr,sjsinju/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,josteink/coreclr,krytarowski/coreclr,sjsinju/coreclr,sagood/coreclr