After upgrading kubernetes plugin from 1.16.7 to 1.27.5, we are having the following issues:

1. In Configure Clouds, Kubernetes Concurrency Limit used to be empty, now it is set to 0. As a result no pod can be started.
2. In Configure Clouds, some of the Kubernetes names got truncated. For example kubernetesProdEpt becomes kubernetesProdE; kubernetesProdSV becomes kubernetesProdS.
3. Pods are set to have nodeSelector of "kubernetes.io/os: linux" by default. In our cluster we don't have nodes with such nodeSelector therefore the job hangs with this error:
   [Warning][demo/jenkins-agent-npmg8-wnfmj][FailedScheduling] 0/7 nodes are available: 7 node(s) didn't match node selector.