Register Python toolchain

Signed-off-by: James Wainwright <james.wainwright@lowrisc.org>

Author: jwnrt

MODULE.bazel

@@ -13,6 +13,8 @@ bazel_dep(
 
 python = use_extension("@rules_python//python/extensions:python.bzl", "python")
 python.toolchain(python_version = "3.10")
+use_repo(python, "pythons_hub")
+register_toolchains("@pythons_hub//:all")
 
 pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip")
 pip.parse(