Fix solarlog test RuntimeWarning

[cdce8p]

Proposed change

Fixes

tests/components/solarlog/test_init.py::test_load_unload
tests/components/solarlog/test_init.py::test_raise_config_entry_not_ready_when_offline
tests/components/solarlog/test_sensor.py::test_all_entities
tests/components/solarlog/test_sensor.py::test_connection_error[SolarLogConnectionError]
tests/components/solarlog/test_sensor.py::test_connection_error[SolarLogUpdateError]
tests/components/solarlog/test_diagnostics.py::test_entry_diagnostics
  /home/runner/work/ha-core/ha-core/homeassistant/components/solarlog/coordinator.py:55:
      RuntimeWarning: coroutine 'AsyncMockMixin._execute_mock_call' was never awaited
  Coroutine created at (most recent call last)
    ...
    self.solarlog.set_enabled_devices({key: True for key in device_list})

solarlog.set_enabled_devices is a normal method, not a coroutine:
https://github.com/dontinelli/solarlog_cli/blob/v0.2.2/src/solarlog_cli/solarlog_connector.py#L138-L139

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:
• Link to documentation pull request:

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[home-assistant]

Hey there @Ernst79, @dontinelli, mind taking a look at this pull request as it has been labeled with an integration (solarlog) you are listed as a code owner for? Thanks!

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