[Support] Merge two implementations of addRangeElementsImpl (NFC)#158212

kazutakahirata merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_20250911_Support_HashBuilderkazutakahirata/llvm-project:cleanup_20250911_Support_HashBuilderCopy head branch name to clipboard