[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]

https://github.com/tlively approved this pull request.

I asked around on an internal LLVM chat and consensus was that this is probably fine to commit, but it would also be ideal to reimplement the logic to avoid the dependency. There was one idea to limit the scope of the import, e.g. 

```
if dwarf_version_string and gdb_version_string:
    if int(dwarf_version_string) >= 5:
        try:
          from looseversion import LooseVersion
        except:
          raise Error("running gdb tests requires the looseversion package")
        if LooseVersion(gdb_version_string) < LooseVersion("10.1"):
```

But I don't want to block this :)

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