[clang] [libclang/python] Fix some type errors, add type annotations (PR #98745)

[Jannick Kremer via cfe-commits]

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@@ -115,9 +146,7 @@ def b(x):
 # object. This is a problem, because it means that from_parameter will see an
 # integer and pass the wrong value on platforms where int != void*. Work around
 # this by marshalling object arguments as void**.
-c_object_p = POINTER(c_void_p)
-
-callbacks = {}
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DeinAlptraum wrote:

`callbacks` could have been a `TypedDict`, but these are always a mouthful and I don't see a reason to have this dict in the first place, so I removed it.

https://github.com/llvm/llvm-project/pull/98745