Specify and document current PM_DEVICE behavior, including PM_DEVICE=n and device_deinit()#90275

cfriedt merged 5 commits intozephyrproject-rtos:mainzephyrproject-rtos/zephyr:mainfrom

bjarki-andreasen:pm-device-driver-deinitbjarki-andreasen/zephyr:pm-device-driver-deinitCopy head branch name to clipboard