[miele] Fix configuration validation and optimize performance (#12510)

[miele] Fix configuration validation and optimize performance (#12510)

* Update bridge status to UNKNOWN before scheduling polling job
* Reduced error log levels to warning
* Validate configuration and leave initialize() with status UNKNOWN
* Extract JSON-RPC handling to separate class
* Use already stored applianceId
* Keep listeners in Set to eliminate duplicates and improve performance
* Reduce access levels for variables exposed to subclasses unneededly
* Initialize translation provider with default language in constructor to avoid nullness
* Divide listener interface into two: discovery and appliance status
* Optimize communication between bridge and handlers
* Fix thing status transitions and support gone appliances
* Do not check/schedule jobs for each listener registration
* Optimize listener registration by using cached appliances
* Optimize state/property updates and reduce logging level for properties
* Fix concurrency issue during handler initialization
* Simplify online/offline transitions
* Use cached appliances for discovery listener callback
* Avoid unneeded call every 15 seconds receiving response with ~5.5 KB payload
* Fix devices being removed after failed RPC calls
* Fix method parameter descriptions

Signed-off-by: Jacob Laursen <jacob-github@vindvejr.dk>