Migrate homematicip_cloud to use async_forward_entry_setups

[bdraco]

Proposed change

Replaces deprecated async_setup_platforms with async_forward_entry_setups

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 #
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• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

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[bdraco]

Its mocking hass as Mock in the test 😢

[bdraco]

There are many tests here that are digging into the internals and patching hass. They should be fixed but its beyond the scope of this PR

[emontnemery]

LGTM, thanks @bdraco 👍