587 functional tests sta

What does this MR do?

Adding a script that tests whether all relevant sta endpoints are reachable for every exisitng project (JIRA)

Why is this MR needed?

To check if the endpoints (Things, Datastreams,...) are reachable after a deployment

How to test this MR?

⚠️

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