Rework and simplify the cleanup of orphan AVM Fritz!Tools entities

[mib1185]

Proposed change

This is a rework of the cleanup service in the fritz integration.

1. we fetch all current available physical devices (based on their mac addresses)
2. we fetch all entities linked to the current config entry
   2.1. check if their mac is in list of available physical devices
   2.2. if not, store its mac as orphan and remove the entity
3. we fetch all device entries linked to the current config entry
   3.1. check if it contains any connection related to an orphan mac (from above)
   3.2. if yes, remove the config entry from this device

In a follow-up PR (based on #116024 (comment)) this cleanup-service will not be exposed anymore to the user, but will run automatically during coordinator updates, when changes in available physical devices are detected.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
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[home-assistant]

Hey there @mammuth, @AaronDavidSchneider, @chemelli74, mind taking a look at this pull request as it has been labeled with an integration (fritz) you are listed as a code owner for? Thanks!

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[mib1185]

@coderabbitai review

[coderabbitai]

Walkthrough

The recent changes to the Fritz integration in Home Assistant focus on improving device and entity management. Key updates include refactoring imports, removing an unused function, and enhancing the logic for handling orphan entities and device removal. These adjustments aim to streamline the cleanup process and ensure better maintenance of the device registry.

Changes

File	Change Summary
homeassistant/components/fritz/coordinator.py	Refactored imports, removed _cleanup_entity_filter function, added CONNECTION_NETWORK_MAC import, introduced config_entry attribute in FritzBoxTools class, and updated async_trigger_cleanup and _async_remove_empty_devices functions to handle orphan entities and device removal more effectively.

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[coderabbitai]

Actionable comments posted: 1

[edenhaus]

Thanks @mib1185 👍