fix/update-umc-server

Updates the umc server to a version which does support to work against an unauthenticated memcached.

TODO list to prepare this MR:

• Verify e2e tests pass
• Update image to released version
• Squash commits together

Test Deployments:

https://gitlab.opencode.de/bmi/opendesk/deployment/opendesk/-/pipelines/new?ref=fix/update-umc-server&var[NAMESPACE]=uv-jbornhold&var[CLUSTER]=uv-gaia&var[DEPLOY_UMS]=yes&var[RUN_TESTS]=no&var[MASTER_PASSWORD_WEB_VAR]=sovereign-workplace&var[JOB_OPENDESK_LINTER_ENABLED]=false