Move temperature conversions to sensor base class (7/8)

[emontnemery]

Proposed change

Move temperature conversions to sensor base class SensorEntity (7/8)

Temperature conversion will only be done for sensors with device class set to temperature.
Temperature conversion will still be done for other sensor entities during a transition period, which will end with Home Assistant Core 2022.3.0.
Temperature conversion for non sensor entities is unaffected by this PR.

This PR migrates sensors in integrations s-u to be compatible with unit conversion in SensorEntity.

Additional PRs will be opened to migrate sensors from other integrations

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

Additional information

• This PR fixes or closes issue: fixes #
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Checklist

• The code change is tested and works locally.
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