New chef devices - Rainsensor waterfreezedetector (#37529)

* Change pm10 unit from ppm to micrograms per cubic meters

* Fix bug - micro is U not M

* sample_app_util/matter_device_types.json

* Water Freeze detector and Rain sensor

* Updates to fix conformance

* Fix conformace for waterfreezedetector device

* Remove un-necessary 'Groups' cluster