CI: Build binaries and serve them as artifacts on every PR

[ajnavarro]

Description

go build is not currently executed as part of our CI pipeline. Add that step by doing the following:

• Add a new template where go build will be executed.
• Send to that template a list of main folders that have to be built
• Get the output artifacts and set them as outputs of the workflow. That will make them available on the workflow webpage and people will be able to download them and test new functionality.

[sw360cab]

It could leverage https://github.com/actions/upload-artifact