Fix duplicate power sensors for Matter 1.3 powerplugs

[marcelveldt]

Proposed change

We have added support for the new Matter 1.3 ElectricalPower/ElectricalEnergy clusters (for native power measurements on e.g. powerplugs) a few weeks back and added a bit of logic to prevent discovery of the old (custom cluster) attributes.

There was however a small oversight (I now realize with an actual device to test with), which is that the new attributes are not on the same endpoint so the check fails and you have duplicate attributes.

This adds support for "absent_clusters" to the discovery schema where you can give a set of clusters that need to be absent (on all endpoints) before an attribute can be discovered. I adjusted the discovery schemas of the custom attributes.

Tested with an Eve plug updated to 3.5.0 (Matter 1.3) and its now working well. No more duplicate entities.
Only downside is that the user has to cleanup the old orphaned entities but we also marked that as breaking issue in the previous PR.

Updated the test fixture as well.

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