Add notification ids to the persistent notifications

[scauwe]

Is your feature request related to a problem? Please describe.
I wanted to trigger an automation whenever the charger was rebooted (to start a new session when one was running before the reboot). For this, I thought creating an automation triggered by the notification "Charger xxxx rebooted" would be simpelst.
This notification however does not provide a fixed id. This id can be used as a filter in the persistent_notification trigger platform.

Describe the solution you'd like
In chargepoint.py:

• In notify_ha, add a parameter notificationId (defaulting to eg "occp_default").
• add this to service_data: "notification_id": notificationId
• In various calls, provide a value for notificationId. eg: in _register_boot_notification, set notificationId = "occp_boot_notification"

Describe alternatives you've considered

• Getting the state of any of the sensors of the charger/ocpp entities, but nothing seems to cover this 100%
• As a workaround, I'm using the trigger without id and add an extra condition for this trigger to filter on the title and message