[clang] [lldb] [BoundsSafety] Introduce LateParsedAttrType AST placeholder type (PR #204125)

[Dan Liew via cfe-commits]

================
@@ -1208,6 +1208,13 @@ bool ASTStructuralEquivalence::isEquivalent(
       return false;
     break;
 
+  case Type::LateParsedAttr:
+    if (!IsStructurallyEquivalent(
----------------
delcypher wrote:

What if the `LateParsedAttrType` had different `LateParsedTypeAttr` pointers. In that case wouldn't we also want to return `false`?

https://github.com/llvm/llvm-project/pull/204125