Deploy deposit v0.13 in staging

New deposit authentication is ready (v0.13.*)

Still found and fixed a couple of issues regarding exception rendering server and client side now landed.

So it's time to deploy it, this will likely revealed some other paper cuts. They will be fixed along the way.

Plan:

• Package v0.13.1
• staging: Install existing users into keycloak
• Deploy configuration change (staging: authentication scheme with keycloak, prod: basic authentication as before for now)
• staging: Ensure integration test is still happy
• further checks (service document access with auth, refuse access, ...)
• Deploy memcached
• Checks
• Wait a bit for complaints if any (there should be none as it's transparent for deposit clients)

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Migrated from T3166 (view on Phabricator)