Draft: 586 function tests proxy

What does this MR do?

Adding a pytest script that tests whether all relevant endpoints are reachable (JIRA) It will be integrated in an automated deployment process

Why is this MR needed?

To check if the components are reachable after a deployment

How to test this MR?

Run the script in the desired environment with python3 pytest tests/deployment/test_proxy.py.

⚠️

Do not change the auto-generated Merge commit message or Squash commit message, otherwise the release pipeline fails!