Fix gtNewStringLiteralNode (#14744)
Fix gtNewStringLiteralNode (#14744)

- there is IAT_VALUE case from constructStringLiteral(CoreRT)

Signed-off-by: Petr Bred <240e5f80fc72498dce662d23121702ab806c37e1@gmail.com>
JosephTremoulet/coreclr,wtgodbe/coreclr,cshung/coreclr,yizhang82/coreclr,JosephTremoulet/coreclr,cshung/coreclr,poizan42/coreclr,yizhang82/coreclr,ruben-ayrapetyan/coreclr,mmitche/coreclr,JosephTremoulet/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,ruben-ayrapetyan/coreclr,poizan42/coreclr,mmitche/coreclr,cshung/coreclr,ruben-ayrapetyan/coreclr,krk/coreclr,wtgodbe/coreclr,krk/coreclr,krk/coreclr,poizan42/coreclr,yizhang82/coreclr,mmitche/coreclr,krk/coreclr,cshung/coreclr,wtgodbe/coreclr,yizhang82/coreclr,krk/coreclr,mmitche/coreclr,mmitche/coreclr,wtgodbe/coreclr,ruben-ayrapetyan/coreclr,yizhang82/coreclr,JosephTremoulet/coreclr,JosephTremoulet/coreclr,JosephTremoulet/coreclr,ruben-ayrapetyan/coreclr,cshung/coreclr,wtgodbe/coreclr,cshung/coreclr,mmitche/coreclr,poizan42/coreclr,yizhang82/coreclr,poizan42/coreclr,wtgodbe/coreclr,krk/coreclr