GcInfoEncoder: Initialize the BitArrays tracking liveness (#8485)
GcInfoEncoder: Initialize the BitArrays tracking liveness (#8485)

The non-X86 GcInfoEncoder library uses two bit-arrays to keep track
of pointer-liveness. The BitArrays are allocated using the arena allocator
which doesn't zero-initialize them. This was causing non-deterministic
redundant allocation of unused slots. This change fixes the problem.
ragmani/coreclr,James-Ko/coreclr,YongseopKim/coreclr,sagood/coreclr,JonHanna/coreclr,JonHanna/coreclr,James-Ko/coreclr,yizhang82/coreclr,tijoytom/coreclr,sjsinju/coreclr,mmitche/coreclr,cshung/coreclr,qiudesong/coreclr,hseok-oh/coreclr,rartemev/coreclr,dpodder/coreclr,botaberg/coreclr,AlexGhiondea/coreclr,pgavlin/coreclr,tijoytom/coreclr,cydhaselton/coreclr,kyulee1/coreclr,ruben-ayrapetyan/coreclr,jamesqo/coreclr,krk/coreclr,yizhang82/coreclr,sagood/coreclr,alexperovich/coreclr,poizan42/coreclr,yeaicc/coreclr,parjong/coreclr,James-Ko/coreclr,russellhadley/coreclr,wtgodbe/coreclr,russellhadley/coreclr,ruben-ayrapetyan/coreclr,poizan42/coreclr,James-Ko/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,qiudesong/coreclr,tijoytom/coreclr,poizan42/coreclr,dpodder/coreclr,cmckinsey/coreclr,sagood/coreclr,parjong/coreclr,yizhang82/coreclr,parjong/coreclr,wateret/coreclr,sjsinju/coreclr,hseok-oh/coreclr,wtgodbe/coreclr,cydhaselton/coreclr,botaberg/coreclr,cshung/coreclr,pgavlin/coreclr,neurospeech/coreclr,sjsinju/coreclr,JosephTremoulet/coreclr,dpodder/coreclr,AlexGhiondea/coreclr,sjsinju/coreclr,ruben-ayrapetyan/coreclr,hseok-oh/coreclr,parjong/coreclr,pgavlin/coreclr,krytarowski/coreclr,krytarowski/coreclr,tijoytom/coreclr,sjsinju/coreclr,rartemev/coreclr,AlexGhiondea/coreclr,russellhadley/coreclr,kyulee1/coreclr,mmitche/coreclr,ruben-ayrapetyan/coreclr,AlexGhiondea/coreclr,krk/coreclr,parjong/coreclr,krytarowski/coreclr,tijoytom/coreclr,poizan42/coreclr,wateret/coreclr,alexperovich/coreclr,mmitche/coreclr,kyulee1/coreclr,rartemev/coreclr,qiudesong/coreclr,hseok-oh/coreclr,neurospeech/coreclr,mmitche/coreclr,botaberg/coreclr,qiudesong/coreclr,mmitche/coreclr,James-Ko/coreclr,mmitche/coreclr,AlexGhiondea/coreclr,botaberg/coreclr,krytarowski/coreclr,JosephTremoulet/coreclr,krk/coreclr,alexperovich/coreclr,ragmani/coreclr,yeaicc/coreclr,neurospeech/coreclr,yeaicc/coreclr,YongseopKim/coreclr,qiudesong/coreclr,cmckinsey/coreclr,cshung/coreclr,wateret/coreclr,gkhanna79/coreclr,JosephTremoulet/coreclr,dpodder/coreclr,pgavlin/coreclr,hseok-oh/coreclr,wateret/coreclr,pgavlin/coreclr,kyulee1/coreclr,cmckinsey/coreclr,cshung/coreclr,qiudesong/coreclr,James-Ko/coreclr,JonHanna/coreclr,JonHanna/coreclr,rartemev/coreclr,russellhadley/coreclr,sagood/coreclr,yeaicc/coreclr,neurospeech/coreclr,ragmani/coreclr,wtgodbe/coreclr,JonHanna/coreclr,gkhanna79/coreclr,jamesqo/coreclr,JonHanna/coreclr,wtgodbe/coreclr,krk/coreclr,jamesqo/coreclr,russellhadley/coreclr,parjong/coreclr,ragmani/coreclr,YongseopKim/coreclr,dpodder/coreclr,cydhaselton/coreclr,ragmani/coreclr,alexperovich/coreclr,sagood/coreclr,poizan42/coreclr,yizhang82/coreclr,neurospeech/coreclr,mskvortsov/coreclr,JosephTremoulet/coreclr,yeaicc/coreclr,yeaicc/coreclr,mskvortsov/coreclr,gkhanna79/coreclr,botaberg/coreclr,JosephTremoulet/coreclr,hseok-oh/coreclr,krytarowski/coreclr,yizhang82/coreclr,gkhanna79/coreclr,kyulee1/coreclr,cmckinsey/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,cshung/coreclr,jamesqo/coreclr,wateret/coreclr,sjsinju/coreclr,mskvortsov/coreclr,neurospeech/coreclr,YongseopKim/coreclr,botaberg/coreclr,krk/coreclr,yizhang82/coreclr,jamesqo/coreclr,yeaicc/coreclr,dpodder/coreclr,cydhaselton/coreclr,pgavlin/coreclr,cydhaselton/coreclr,krytarowski/coreclr,russellhadley/coreclr,rartemev/coreclr,kyulee1/coreclr,mskvortsov/coreclr,wtgodbe/coreclr,poizan42/coreclr,wateret/coreclr,YongseopKim/coreclr,alexperovich/coreclr,rartemev/coreclr,gkhanna79/coreclr,sagood/coreclr,tijoytom/coreclr,ruben-ayrapetyan/coreclr,krk/coreclr,ruben-ayrapetyan/coreclr,cmckinsey/coreclr,JosephTremoulet/coreclr,jamesqo/coreclr,cmckinsey/coreclr,mskvortsov/coreclr,alexperovich/coreclr,cydhaselton/coreclr,cshung/coreclr,cmckinsey/coreclr,ragmani/coreclr,gkhanna79/coreclr