Operator checks for existence of NetBird API key to create controllers
for Service, NBResource, NBPolicy ...etc, while the Helm chart checks
for Values.ingress.enabled, this causes crashes if NetBird API Key is
provided but ingress.enabled is set to `false`.
This fixes this discrepancy by checking NetBird API key in Helm instead
of ingress enabled value.
resolves#13
Goreleaser was causing issues when helm chart action created releases
for packaged helm chart, this PR replaces goreleaser with a much simpler
build and push model, and returns packaged helm charts to normal.