Add device support for Nivian NVS-A6WG alarm (#4658)
* Add device support for Nivian NVS-A6WG alarm
* Remove name field from language select entity
* Changed several entities names and classes
* Updated language dps values
* Merge PR #4648
- add product details for identical Curv alarm
- add info attribute with device info
- add
* fix (nivian_nvs_a6wg_alarm): mark info as sensitive
From the Curv log, it appears to contain IMEI which may be considered sensitive
* Fix indentation in nivian_nvs_a6wg_alarm.yaml
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>