No Tests included for gateway-evpn-cni code

[sandersms]

          - code dup

• ci failed
• no tests
• no godpu usage
• readme removed badges
• readme : i want to contribute section must stay

Originally posted by @glimchb in https://github.com/opiproject/opi-gateway-evpn-cni/pull/14#pullrequestreview-1895964427

[sandersms]

code dup, godpu usage, removed badges, and contribute section in readme have been resolved.