[llvm] Replace distutils.version with looseversion since the former was deprecated in python 3.10 and removed in 3.12. (PR #99549)

[Thomas Lively via llvm-commits]

tlively wrote:

Change LGTM, but I'm not sure whether LLVM has policies around introducing new developer dependencies like this package. Do you know?

https://github.com/llvm/llvm-project/pull/99549