Handle mains power for Matter appliances

[marcelveldt]

Proposed change

Matter appliances, such as an Airconditioner or Air purifier, can have an (optional) mains power switch on the OnOff cluster. This mains power switch is exposed by us as an actual switched entity as well (named Power).

Currently when the mains power is turned off, the other control entities (for fan and climate) show still as if they're active in the HA UI while in fact they are not, that looks weird/funny. So this PR accounts for the fact that the OnOff cluster is present (on the same endpoint as the main control) to override the state if the mains power switch is OFF.

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

Hey there @home-assistant/matter, mind taking a look at this pull request as it has been labeled with an integration (matter) you are listed as a code owner for? Thanks!

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[frenck]

Thanks, @marcelveldt 👍

../Frenck