Use goreleaser to build and package summon-conjur

[dustinmm80]

This pull request changes how we build and package summon-conjur. I've implemented goreleaser, a tool that lets you use a .goreleaser.yml file to specify how to build and package your go app.

Using goreleaser comes with some nice benefits, like:

• consistent build and package environment, declarative yaml configuration
• builds deb/rpm packages
• creates homebrew file, ready to upload to https://github.com/cyberark/homebrew-tools

goreleaser can also automatically create github releases and upload artifacts to them, but I opted out of that in the config file for this project. I think having the homebrew file in CI artifacts makes it easy to add to homebrew-tools. Having the tarballs and shasums makes it easy to upload to github releases.

See the artifacts here:

• https://jenkins.conjur.net/job/cyberark--summon-conjur/job/use-goreleaser/
• https://gitlab.com/cyberark/summon-conjur/-/jobs/86779196/artifacts/browse/dist/

See a full list of options here: https://goreleaser.com/customization/

This is the first test of goreleaser. I think this was a good experience and we should consider adopting this tool for other go projects. We could build and push a image to dockerhub so multiple projects can use it easily.

I will follow this merge up with adding summon-conjur to homebrew repo.

[sgnn7]

CR pass (with pending task of maybe caching the dep dependencies to be opened)