Include available namespaces in all localDataCenter errors

Description

When a localDataCenter is set but the setting doesn't match any of the local dcs, an error with the following message is thrown:

But when localDataCenter is not set, the error message does not show the available dcs, only that the argument is missing:

The error should include the available dcs, for example:

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Unassigned

Reporter

Jorge Bay Gondra

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