[llvm] [lldb] Configure pyright to the documented minimum python version (PR #162952)

[John Harrison via llvm-commits]

ashgti wrote:

One other issue with type checking the python code is the swig generated code does not have any annotations.

There is an open issue https://github.com/swig/swig/issues/735 for swig generating python type annotations, but at the moment the `lldb` module itself will not be well covered by types.

https://github.com/llvm/llvm-project/pull/162952