Fixed radar upload backend network policy

[keyvaann]

Since we reuse PostgreSQL chart and change its name, the selector label also needs to change to match that.

  labels:
    app.kubernetes.io/component: primary
    app.kubernetes.io/instance: radar-upload-postgresql
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: postgresql
    apps.kubernetes.io/pod-index: "0"
    controller-revision-hash: radar-upload-postgresql-7c65bcc55c
    helm.sh/chart: postgresql-12.1.9
    statefulset.kubernetes.io/pod-name: radar-upload-postgresql-0

[github-actions]

Great PR! Please pay attention to the following items before merging:

Files matching charts/*/values.yaml:

• Is the PR adding a new container? Please reviewer, add it to the models (internal process)
• Is the PR adding a new parameter? Please, ensure it’s documented in the README.md

This is an automatically generated QA checklist based on modified files.

[pvannierop]

It is a bit unclear how this works, but I assume you have figured this out. LGTM.