MatterServer enhancements (#410)
* Add automatic port assignment and streamline unique Ids
* Added functionality to clear session contexts including data in sub-contexts or not
* Adjusted functionality to clear session contexts including data in sub-contexts or not
* Offer reset method to remove
* Allow to delete full storage also from storagebackend and ad to shell
* fix name of parameter
* address review feedback
* fix tests
* Address review feedback
