UniFi refactor using site data

[Kane610]

Breaking change

Proposed change

Improve how sites are being used and remove the use of site description API as the relevant information is available in site.
Kane610/aiounifi@v54...v55
New APIs in aiounifi are affecting some tests counting amount of http requests made (reflected in last commit).

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

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
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Checklist

• The code change is tested and works locally.
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[Noltari]

LGTM

[elupus]

Looks good

[Kane610]

Thank you very much @elupus 🎉