feat: add httproute template

Author: mikhail-klimko

charts/gitops-runtime/templates/httproute.yaml

@@ -21,7 +21,12 @@ spec:
   {{- else }}
     {{- fail "ERROR: global.runtime.httpRoute.parentRefs is required when httpRoute is enabled" }}
   {{- end }}
-  hostnames: {{- toYaml .Values.global.runtime.httpRoute.hostnames | nindent 4 }}
+  hostnames:
+  {{ - if .Values.global.runtime.httpRoute.hostnames }}
+     {{- toYaml .Values.global.runtime.httpRoute.hostnames | nindent 4 }}
+  {{- else }}
+     {{- fail "ERROR: global.runtime.httpRoute.hostnames is required when httpRoute is enabled" }}
+  {{- end }}
   rules:
     - matches:
         - path: