Add authentication to the queue

[jacob-williamson]

Fixes #2

Adds authentication to the queue. Another ticket should be created to improve authorisation, taking account what visits users have access to etc. For now we just have a whitelist of approved fedIDs.

• If no OIDC config is provided, the queue will not authenticate users.
• If no whitelist is provided in config, anyone who has authenticated can use any endpoint.
• Providing a whitelist with no OIDC config doesn't make much sense and the whitelist wouldn't be used.

The user who queued a task is now also added to the task object, so this can now be displayed in the UI.

Instructions on how to test:

• Start up a local queue with config that adds authentication: daq-queuing-service --config tests/system_tests/config_with_auth.yaml -p 8001 --dev
• Go to the docs page
• Confirm you can't use any of the endpoints other than healthz and get_queue_state, and the message not authenticated is returned
• Retrieve a valid token:
  • Visit ulims.diamond.ac.uk
  • Log in
  • Right click and click Inspect
  • Go to Storage -> Session Storage -> https://ulims.diamond.ac.uk
  • Copy the value associated with the KEYCLOAK_TOKEN key
• Click the authorise button in the docs page, paste in the token
• Confirm the endpoints now work

Testing authorisation:

• Go to tests/system_tests/config_with_auth.yaml
• Add the following at the bottom of the file:

authorisation_whitelist:
  - "somebody"

• Restart the local queue and try the endpoints
• Confirm that for any endpoints other than get_config, you get a not authorised error.
• Add your fed ID to the authorisation_whitelist
• Restart the queue and confirm you can now use all the endpoints

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.87%. Comparing base (016ac31) to head (86effdf).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #86      +/-   ##
==========================================
+ Coverage   98.76%   98.87%   +0.11%     
==========================================
  Files          18       20       +2     
  Lines         889      979      +90     
==========================================
+ Hits          878      968      +90     
  Misses         11       11              

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