[ADT] Apply Rule of Five to StringTable::Iterator#160815

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

kazutakahirata:cleanup_20250925_ADT_StringTable_operator_assignkazutakahirata/llvm-project:cleanup_20250925_ADT_StringTable_operator_assignCopy head branch name to clipboard