Setup config entry even if vizio device is unreachable

[raman325]

Proposed change

We would previously raise PlatformNotReady during platform setup if a Vizio device couldn't be communicated with. Since we already do validation during the config flow to ensure that the device is there, I think it's safe to remove this guard. There are users that use their devices in "Eco Mode" which means that the device can't be talked to while it is off, leading to lots of errors in the logs if they restart their HA instance while it is off. They should have their devices setup properly but shown in an unavailable state.

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)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example entry for configuration.yaml:

# Example configuration.yaml

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: Vizio unavailable on restart if TV is off (again) #34300
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

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  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
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[MartinHjelmare]

Looks good!