Do not use GT_INDEX in impInitializeArrayIntrinsic
Do not use GT_INDEX in impInitializeArrayIntrinsic

We know that array size is larger than 0 so we do not need a range check.  This range check survives until the RangeCheck phase so it creates more work of the phases before it. It is also very unlikely to enable other optimizations, subsequent `a[0]` range checks can still be eliminated because the array length is known and constant.

dpodder/coreclr,rartemev/coreclr,mmitche/coreclr,dpodder/coreclr,tijoytom/coreclr,botaberg/coreclr,kyulee1/coreclr,russellhadley/coreclr,krk/coreclr,russellhadley/coreclr,russellhadley/coreclr,yizhang82/coreclr,mmitche/coreclr,parjong/coreclr,botaberg/coreclr,mmitche/coreclr,hseok-oh/coreclr,rartemev/coreclr,mskvortsov/coreclr,wtgodbe/coreclr,yizhang82/coreclr,poizan42/coreclr,hseok-oh/coreclr,tijoytom/coreclr,parjong/coreclr,JosephTremoulet/coreclr,tijoytom/coreclr,parjong/coreclr,AlexGhiondea/coreclr,mskvortsov/coreclr,wateret/coreclr,cshung/coreclr,cshung/coreclr,AlexGhiondea/coreclr,botaberg/coreclr,dpodder/coreclr,rartemev/coreclr,hseok-oh/coreclr,kyulee1/coreclr,wateret/coreclr,parjong/coreclr,poizan42/coreclr,cshung/coreclr,kyulee1/coreclr,tijoytom/coreclr,yizhang82/coreclr,ruben-ayrapetyan/coreclr,botaberg/coreclr,JonHanna/coreclr,russellhadley/coreclr,ruben-ayrapetyan/coreclr,mskvortsov/coreclr,yizhang82/coreclr,cshung/coreclr,krk/coreclr,JonHanna/coreclr,parjong/coreclr,wtgodbe/coreclr,ruben-ayrapetyan/coreclr,rartemev/coreclr,ruben-ayrapetyan/coreclr,krk/coreclr,wateret/coreclr,wtgodbe/coreclr,wateret/coreclr,poizan42/coreclr,wateret/coreclr,rartemev/coreclr,JosephTremoulet/coreclr,mmitche/coreclr,JonHanna/coreclr,parjong/coreclr,cshung/coreclr,kyulee1/coreclr,AlexGhiondea/coreclr,JosephTremoulet/coreclr,hseok-oh/coreclr,mmitche/coreclr,hseok-oh/coreclr,poizan42/coreclr,dpodder/coreclr,botaberg/coreclr,JosephTremoulet/coreclr,krk/coreclr,wtgodbe/coreclr,kyulee1/coreclr,poizan42/coreclr,botaberg/coreclr,dpodder/coreclr,mskvortsov/coreclr,JonHanna/coreclr,dpodder/coreclr,kyulee1/coreclr,JonHanna/coreclr,hseok-oh/coreclr,cshung/coreclr,JosephTremoulet/coreclr,AlexGhiondea/coreclr,wateret/coreclr,mskvortsov/coreclr,AlexGhiondea/coreclr,mmitche/coreclr,wtgodbe/coreclr,ruben-ayrapetyan/coreclr,ruben-ayrapetyan/coreclr,JonHanna/coreclr,yizhang82/coreclr,krk/coreclr,rartemev/coreclr,russellhadley/coreclr,russellhadley/coreclr,krk/coreclr,tijoytom/coreclr,yizhang82/coreclr,mskvortsov/coreclr,tijoytom/coreclr,AlexGhiondea/coreclr,poizan42/coreclr,wtgodbe/coreclr,JosephTremoulet/coreclr