Introduce a validate password method which only peaks into the archive
to validate the password before starting the actual restore process.
This makes sure that a wrong password returns an error even when
restoring the backup in background.
* Fix and extend cloud backup support
* Clean up task for cloud backup and remove by location
* Args to kwargs on backup methods
* Fix backup remove error test and typing clean up
* Stop backup if pre backup failed in Core
* Fix API tests
* Partial backup in ci since there's no Home assistant
* Add ssl folder to partial backup
* Allow backups when Home Assistant is not running
* Undo change to skip db test
* Add background option to backup APIs
* Fix decorator tests
* Working error handling, initial test cases
* Change to schedule_job and always return job id
* Add tests
* Reorder call at/later args
* Validation errors return immediately in background
* None is invalid option for background
* Must pop the background option from body
