Document in guide and examples how to address Authentication and Authorization use cases for Workflows

See initial assessment: https://docs.google.com/document/d/1rTq94zxix81CQ9zcIsw1KnFtf1PZS-rngZD36hSWF7g/edit#heading=h.iliu1ypskbn3

In this guide, users should be able to expose their workflow applications deployed with the Serverless Logic Operator via a custom Ingress that can perform Authentication and Authorization with an OIDC server.