SADS switchover

[c0c0n3]

This PR make the SADS "offline" service the only SADS service accessible to external users.
In detail:

• SADS "online" is now set to have no replicas. The deployment descriptors are still there, but there's no service running in the cluster. Ditto for the Argo CD app---we keep it around just in case.
• SADS "offline" now handles all incoming requests to the /sads path.
• The /sads-offline path is unavailable.

Breaking change notice

• Wamtechnik will have to change the URL they use to access SADS "offline". After this PR gets merged, they'll have to use "https://kitt4sme.collab-cloud.eu/sads/" instead of the current URL of "https://kitt4sme.collab-cloud.eu/sads-offline/".
• The "static page" (home) needs to be updated as well to reflect the URL change.