bump operator to v1.7.1

.github/ISSUE_TEMPLATE/postgres-operator-issue-template.md

Makefile

README.md

charts/postgres-operator-ui/Chart.yaml

charts/postgres-operator-ui/index.yaml

charts/postgres-operator-ui/postgres-operator-ui-1.7.1.tgz

charts/postgres-operator-ui/values.yaml

charts/postgres-operator/Chart.yaml

charts/postgres-operator/crds/operatorconfigurations.yaml

charts/postgres-operator/index.yaml

charts/postgres-operator/postgres-operator-1.7.1.tgz

charts/postgres-operator/values.yaml

docs/administrator.md

docs/index.md

docs/reference/operator_parameters.md

go.mod

go.sum

kubectl-pg/go.mod

manifests/complete-postgres-manifest.yaml

manifests/configmap.yaml