wip: bzlmod example with bazel 8 pass

Author: rickeylev

.bazelignore

@@ -26,3 +26,4 @@ examples/py_proto_library/bazel-py_proto_library
 tests/integration/compile_pip_requirements/bazel-compile_pip_requirements
 tests/integration/ignore_root_user_error/bazel-ignore_root_user_error
 tests/integration/local_toolchains/bazel-local_toolchains
+tests/integration/py_cc_toolchain_registered/bazel-py_cc_toolchain_registered