Add Go example

[uilianries]

This example is lost, but listed on Conan Docs.

I updated it according our Conan version.

https://docs.conan.io/en/latest/howtos/other_languages_package_manager/go.html

[danimtb]

Agree with @memsharded, this does not worth the effort and the docs are outdated

[uilianries]

Should we remove Go from Docs? Otherwise we need to update both example and documentation.

I would remove Go from Docs, because I don't see people requesting it on Conan issues. If we want to show such support, we could write a blog post instead.

[memsharded]

Yes, lets remove Go from docs