[ADT] Use SmallPtrSet or SmallSet flexibly (NFC)#154680

kazutakahirata merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_20250820_deprecate_SmallSet_ptr_unitkazutakahirata/llvm-project:cleanup_20250820_deprecate_SmallSet_ptr_unitCopy head branch name to clipboard