New pipeline / CD instance cannot run without adding a user

[in-1911]

Description

When the ALM DA deploys a set of toolchains / pipelines along with a new CD instance, trying to run any trigger immediately afterwards fails with an error:
At least one authorized user is required in the Continuous Delivery service instance before non-User IDs can be used.

The DA is deployed using a trusted profile and possibly because of that the CD instance does not have any authorized users attached.
This affects the deployments in a stack (e.g. RAG Pattern) in which case a webhook trigger is called immediately after ALM deployment.

The Continuous Delivery does not seem to have a documented API for adding users, but the UI makes an API calls to add a user by e-mail.

New or affected modules

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[in-1911]

Note - if a user goes to check the failed run, the user ID is then automatically added to the authorized user list in the CD instance.