Use dh-golang workflow

Use the dh-golang build workflow for the kittens binary instead of what is happening now, which is imitating the source code of dh-golang.

This PR builds upon the patch by Nilesh Patra nilesh@debian.org sourced from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1037440#37

To build, run: gbp buildpackage --git-ignore-branch (optionally add --git-pbuilder)