Remove goreleaser and fix helm packaging (#6)

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.

helm/kubernetes-operator/templates/serviceaccount.yaml

@@ -0,0 +1,13 @@
+{{- if .Values.operator.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "kubernetes-operator.serviceAccountName" . }}
+  labels:
+    {{- include "kubernetes-operator.labels" . | nindent 4 }}
+  {{- with .Values.operator.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+automountServiceAccountToken: {{ .Values.operator.serviceAccount.automount }}
+{{- end }}