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

[Ulrich Weigand via cfe-commits]

uweigand wrote:

@Endilll thanks for the heads-up!   Looks like there has been some issue with network connectivity in our test lab over the weekend.  This is supposed to be resolved now; I'll keep observing the status for a bit.

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