Update all systemmonitor sensors in one executor call

[bdraco]

Proposed change

• All sensors are now updated in one jump to the executor (reduces the number of created SyncWorkers at startup if the executor isn't already starved)
• Typing now in more places
• throughput_network_out was missing a list element

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

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# Example configuration.yaml

Additional information

• This PR fixes or closes issue: fixes #
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Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
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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]

Thanks. Retested 👍