Change default CI job for ARM and clean-up (#10370)
Change default CI job for ARM and clean-up (#10370)

- Change ARM CI job triggered by PR: ubuntu16.04 debug, ubuntu release, tizen debug/release
- Clean-up: remove emulator build/test
- Change ubuntu16.04 x64 default job name and trigger phrase: conflict triggerring with arm
hseok-oh/coreclr,botaberg/coreclr,cydhaselton/coreclr,yeaicc/coreclr,mmitche/coreclr,kyulee1/coreclr,wtgodbe/coreclr,qiudesong/coreclr,hseok-oh/coreclr,botaberg/coreclr,hseok-oh/coreclr,jamesqo/coreclr,krk/coreclr,botaberg/coreclr,JosephTremoulet/coreclr,russellhadley/coreclr,krytarowski/coreclr,YongseopKim/coreclr,krk/coreclr,cydhaselton/coreclr,ragmani/coreclr,parjong/coreclr,russellhadley/coreclr,krytarowski/coreclr,cmckinsey/coreclr,AlexGhiondea/coreclr,wtgodbe/coreclr,parjong/coreclr,ragmani/coreclr,qiudesong/coreclr,JosephTremoulet/coreclr,tijoytom/coreclr,tijoytom/coreclr,wateret/coreclr,alexperovich/coreclr,wateret/coreclr,dpodder/coreclr,gkhanna79/coreclr,JosephTremoulet/coreclr,cmckinsey/coreclr,James-Ko/coreclr,wateret/coreclr,gkhanna79/coreclr,AlexGhiondea/coreclr,yeaicc/coreclr,pgavlin/coreclr,ruben-ayrapetyan/coreclr,alexperovich/coreclr,qiudesong/coreclr,yizhang82/coreclr,cmckinsey/coreclr,tijoytom/coreclr,botaberg/coreclr,rartemev/coreclr,sagood/coreclr,ruben-ayrapetyan/coreclr,dpodder/coreclr,mmitche/coreclr,AlexGhiondea/coreclr,jamesqo/coreclr,jamesqo/coreclr,parjong/coreclr,poizan42/coreclr,botaberg/coreclr,ruben-ayrapetyan/coreclr,krk/coreclr,yizhang82/coreclr,JonHanna/coreclr,ragmani/coreclr,JonHanna/coreclr,rartemev/coreclr,sagood/coreclr,pgavlin/coreclr,sagood/coreclr,tijoytom/coreclr,YongseopKim/coreclr,cmckinsey/coreclr,sagood/coreclr,rartemev/coreclr,ragmani/coreclr,cydhaselton/coreclr,hseok-oh/coreclr,mmitche/coreclr,mmitche/coreclr,krytarowski/coreclr,pgavlin/coreclr,JonHanna/coreclr,russellhadley/coreclr,James-Ko/coreclr,wtgodbe/coreclr,James-Ko/coreclr,krytarowski/coreclr,tijoytom/coreclr,jamesqo/coreclr,kyulee1/coreclr,YongseopKim/coreclr,kyulee1/coreclr,jamesqo/coreclr,qiudesong/coreclr,cshung/coreclr,wtgodbe/coreclr,rartemev/coreclr,yizhang82/coreclr,yeaicc/coreclr,ruben-ayrapetyan/coreclr,JosephTremoulet/coreclr,krytarowski/coreclr,cydhaselton/coreclr,YongseopKim/coreclr,alexperovich/coreclr,krytarowski/coreclr,russellhadley/coreclr,cmckinsey/coreclr,rartemev/coreclr,pgavlin/coreclr,russellhadley/coreclr,yeaicc/coreclr,alexperovich/coreclr,kyulee1/coreclr,YongseopKim/coreclr,jamesqo/coreclr,alexperovich/coreclr,dpodder/coreclr,dpodder/coreclr,krk/coreclr,sagood/coreclr,botaberg/coreclr,poizan42/coreclr,parjong/coreclr,James-Ko/coreclr,wtgodbe/coreclr,dpodder/coreclr,wateret/coreclr,qiudesong/coreclr,cmckinsey/coreclr,dpodder/coreclr,poizan42/coreclr,pgavlin/coreclr,sagood/coreclr,qiudesong/coreclr,wateret/coreclr,JonHanna/coreclr,cydhaselton/coreclr,AlexGhiondea/coreclr,cmckinsey/coreclr,AlexGhiondea/coreclr,yizhang82/coreclr,gkhanna79/coreclr,mskvortsov/coreclr,kyulee1/coreclr,rartemev/coreclr,krk/coreclr,mskvortsov/coreclr,JonHanna/coreclr,mmitche/coreclr,JonHanna/coreclr,gkhanna79/coreclr,mskvortsov/coreclr,parjong/coreclr,ragmani/coreclr,mskvortsov/coreclr,kyulee1/coreclr,JosephTremoulet/coreclr,parjong/coreclr,pgavlin/coreclr,yeaicc/coreclr,hseok-oh/coreclr,alexperovich/coreclr,cydhaselton/coreclr,gkhanna79/coreclr,russellhadley/coreclr,mskvortsov/coreclr,poizan42/coreclr,cshung/coreclr,ragmani/coreclr,gkhanna79/coreclr,YongseopKim/coreclr,hseok-oh/coreclr,yeaicc/coreclr,cshung/coreclr,yizhang82/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,JosephTremoulet/coreclr,wtgodbe/coreclr,yizhang82/coreclr,yeaicc/coreclr,cshung/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,mmitche/coreclr,cshung/coreclr,krk/coreclr,tijoytom/coreclr,wateret/coreclr,ruben-ayrapetyan/coreclr,James-Ko/coreclr,cshung/coreclr,poizan42/coreclr,James-Ko/coreclr