graphql: Make template multi-instance

swh/templates/graphql/_helper_configmap.yaml

swh/templates/graphql/autoscaling.yaml

swh/templates/graphql/configmap.yaml

swh/templates/graphql/deployment.yaml

swh/templates/graphql/ingress.yaml

swh/templates/graphql/service.yaml

swh/values.yaml

swh/values/default.yaml

swh/values/minikube.yaml

swh/values/production/swh-cassandra.yaml

swh/values/production/swh.yaml

swh/values/staging/overrides/swh-cassandra-next-version.yaml

swh/values/staging/swh-cassandra.yaml

swh/values/staging/swh.yaml