Buildozer: changing attributes in override functions of MODULE.bazel

Buildozer is not able to recognize the functions with `module_name` in MODULE.bazel file. So `buildozer print //MODULE.bazel:all` would print something like:

```
main module
rules_python bazel_dep
rules_python_gazelle_plugin bazel_dep
gazelle bazel_dep
hermetic_cc_toolchain bazel_dep
bazel_skylib bazel_dep
rules_proto_grpc bazel_dep
archive_override
rules_proto_grpc_python bazel_dep
archive_override
```
Note that the `archive_override` doesn't have name. So we can't update them from command line.

We can follow the convention of Bazel to create a target `rules_proto_grpc~override` when Buildozer sees a *_override rule with `module_name = "rules_proto_grpc"`.

Start by reproducing the `buildozer print //MODULE.bazel:all` output for an override function with `module_name`. Read the Buildozer handling for `MODULE.bazel` override functions and its command-line update path. Done means a `*_override` with `module_name` produces the corresponding `~override` target and can be updated from the command line.

Written by the indexing model from the issue text.