[clang] [libclang/python] Add typing annotations for the Type class (PR #140378)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

> LLVM Buildbot has detected a new failure on builder `clang-s390x-linux-lnt` running on `systemz-1` while building `clang` at step 13 "setup lit".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/136/builds/3945
> Here is the relevant piece of the build log for the reference

@uweigand it seems that it's a rather common (yet intermittent) failure with this particular bot. Can you look into it?

https://github.com/llvm/llvm-project/pull/140378