Fix performance regression introduced in #142531 by excluding Storage{Live,Dead} from CGU size estimation#155491

ohadravid wants to merge 2 commits intorust-lang:mainrust-lang/rust:mainfrom

ohadravid:faster-storage-in-copyprop-and-gvnohadravid/rust:faster-storage-in-copyprop-and-gvnCopy head branch name to clipboard