Do not base power switch state on appliance's operation state at Home Connect

[Diegorro98]

Proposed change

Simplifícate how the state of the power switch is determined by removing unnecessary functionality.

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

I don't know what is the reason behind using the appliance's operation state to determine if the appliance is on or off.
If the appliance cannot report on or off, the user will know it and can use the operation state to make automations.
I think that entities states should not be based on other values unless a good reason, which I think is missing in this case as this was added with the first commit (even in the very first commit at #29214 (95aca52)) of this integration and was not reasoned.

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[home-assistant]

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

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