Fix bzlmod CI failure by loading cc_binary

[chiphogg]

Very surprising that this didn't fail before, as apparently this load
statement was always needed for bzlmod. It started failing in #637 ---
and, interestingly, only on a second commit. Still, the fix is
straightforward.

[geoffviola]

Very surprising that this didn't fail before

Should we make a change to the github actions workflow to catch this class of errors?

[chiphogg]

Very surprising that this didn't fail before

Should we make a change to the github actions workflow to catch this class of errors?

That's the weird thing. It did catch this error! But for whatever reason, it didn't seem to catch it until several commits after the original error had landed.

We saw something similar with several of the bazel changes in the migration to bzlmod. I think rules_go was the wrong version or something. It never triggered while @hoffbrinkle was landing PRs, and only triggered later when I tried to run the code. These failures have only seemed to happen with bzlmod-related code. It's a little unsettling, but at least we do still seem to get the coverage eventually. 😅