Alarm Control Panel Entity code validation

The AlarmControlPanelEntity is now enforcing validation of code for alarm control panel entities, which set code_arm_required to True (default behavior). Service calls fail if no code is provided when a code is required.

Previously this was entirely optional, and a user could skip code entry regardless of it was needed by the integration or not (and as such each integration needed to implement its own check).

As the default behavior is that code is required, custom integrations that don't require a code input need to set code_arm_required to False or the user will always have to input a code regardless of if it's needed by the service calls.