[clang] [libclang/python] Add some logical typing changes. (PR #138074)

[Vlad Serebrennikov via cfe-commits]

================
@@ -2955,6 +2962,10 @@ def __getitem__(self, key):
             raise IndexError
         return CompletionChunk(self.obj, key)
 
+    def __iter__(self):
+        for i in range(len(self)):
+            yield self[i]
+
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Endilll wrote:

Can we put this under `if TYPE_CHECKING` somehow?

https://github.com/llvm/llvm-project/pull/138074