keyIdentifierValue is broken when replicas > 1

[kfox1111]

The current implementation of keyIdentifierValue configuration in the chart is broken. It only allows one name, breaking when replicas > 1

In statefulset mode, we should append the statefulset pod id number to it automatically to keep it unique.

We should also make sure we reject configuration when mode is deployment, replicas > 1 and keyIdentifierValue is set

[faali1]

Just to add a little bit more context, with the current keyIdentifierValue implementation, if you have replicas > 1 all the pods try to use the same key (because the identifier is the same.) This can lead to race conditions with UpdateAlias and DisposeKeys