Log server-side task failure caused by invalid command in test server

[cretz]

Describe the solution you'd like

Today io.temporal.internal.testservice.CommandVerifier.verifyCommand is called on each command to make sure valid or a task failure occurs. Since this is not a task failure caused by caller and there is no UI for Java test server, this is just silently failed. We should log (where it's called from TestWorkflowMutableStateImpl). This only applies to search attributes today, because that's the only thing we check command validity on (we don't need to log unhandled command, that's a normal state of operation).