Jenkins throws "KubernetesAuthException" when starting Pod agent

Issue

Using the Jenkins image openshift4/ose-jenkins:v4.6, starting a Jenkins agent with Jenkins Domain Credentials (with CASC) fails with the following error message:
```
KubernetesAuthException: No credentials found with id 1a12dfa4-7fc5-47a7-aa17-cc56572a41c7
```

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