[clang] [BoundsSafety] Support late parsing for `counted_by` in type positions (PR #166491)

[Hans Wennborg via cfe-commits]

================
@@ -1238,6 +1238,9 @@ struct DeclaratorChunk {
 
   ParsedAttributesView AttrList;
 
+  using LateAttrListTy = SmallVector<void *, 1>;
----------------
zmodem wrote:

`void*` seems unusual. Don't we have a better type to use?

https://github.com/llvm/llvm-project/pull/166491