fix: disable bzlmod for"with_go_source" example

[tpasternak]

Checklist

• [ ] I have filed an issue about this change and discussed potential changes with the maintainers.
• [ ] I have received the approval from the maintainers to make this change.
• [ ] This is not a stylistic, refactoring, or cleanup change.

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Discussion thread for this change

Issue number: <please reference the issue number or url here>

Description of this change

[mai93]

is the plugin failing to support bzlmod for this project?

[blorente]

I think this is not a plugin issue, but rather a project issue. As it stands the project is not bzlmod-compatible (running bazel run //:gazelle fails). Maybe we can just disable bzlmod in the .bazelrc instead of the project file and make it compatible later

[tpasternak]

But it's only because we have --enable_bzlmod in the root .bazelrc

[tpasternak]

oh, wait, I'm wrong