[clang-tidy] Use SmallPtrSet directly instead of SmallSet (NFC)#154679

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

kazutakahirata:cleanup_20250820_deprecate_SmallSet_ptr_clang_tidykazutakahirata/llvm-project:cleanup_20250820_deprecate_SmallSet_ptr_clang_tidyCopy head branch name to clipboard