Add 'device' column in the /expose screen for Assist

[thibaultmol]

Describe the feature

I'm surprised that there is no column when you're in /config/voice-assistants/expose/ that allows you to see what the 'parent' device is of a given entity. I would love to be able to sort/group/search that list based on what devices the entities are from. Which is currently not possible

Example commands

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Use cases

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Anything else?

No response