[nrf fromlist] Fix handling command handler status for group messages #351
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Pulled fix contributed to Matter upstream and fixing commands handling for the groupcast communication:
The command handler status is added for the response purposes even in case of invoking commands targeted to the group. In case of using more than one endpoint on a single Matter node that was added to the same group, it leads to the application crash. The direct reason is a state check, that succeeds only for the first endpoint and fails for the subsequent calls.
Added a new state flag, which informs if the command that is currently handled origins from groupcast communication or not. In case of targeting the group, application returns prematurely and do not try to add status.