Docs: Add documentation section on how to configure Tank as an OIDC client

As soon https://gitlab.servus.at/aura/meta/-/issues/60 is implemented, you can simply refer to this section in the Admin Guide.

changed milestone to %Aura 0.9

added To Do label

assigned to @nnrcschmdt

added P1 label

@nnrcschmdt I've created this META documentation on how to setup Dashboard and Tank as OIDC clients in more detail: https://gitlab.servus.at/aura/meta/-/blob/master/docs/administration/oidc-client-config.md

So I guess it should be sufficient if add a reference to the config section in the META repo. What are you thoughts on that?

added Doing label and removed To Do label

OIDC client config is referred in the README

closed

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