Support bracket enclosed names in TZ POSIX rules
Support bracket enclosed names in TZ POSIX rules

The POSIX time zone rules at the end of a tzfile have been updated to allow digits, plus signs and minus signs in the time zone names by enclosing the name in `<` and `>` characters. TimeZoneInfo's parsing logic was written using an older version of the spec, so it didn't have support for this format.

Fix https://github.com/dotnet/corefx/issues/16962

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