Add support for sleepy BTHome devices

[Ernst79]

Proposed change

This PR adds support for "sleepy" BTHome devices. Sleepy devices are sensors that do not send BLE data on a regular basis, but only when e.g. pushing a button or opening a door. BTHome has added a flag in the BLE advertisement that tells the receiver (HA) that the device isn't sending updates on a regular basis. This PR makes sure that these "sleepy" devices remain availalable.

bthome-ble change logs

• https://github.com/Bluetooth-Devices/bthome-ble/releases/tag/v2.11.2
• https://github.com/Bluetooth-Devices/bthome-ble/releases/tag/v2.11.1
• https://github.com/Bluetooth-Devices/bthome-ble/releases/tag/v2.11.0
• https://github.com/Bluetooth-Devices/bthome-ble/releases/tag/v2.10.1
• https://github.com/Bluetooth-Devices/bthome-ble/releases/tag/v2.10.0

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:

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.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• Untested files have been added to .coveragerc.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[bdraco]

    @property
    def available(self) -> bool:
        """Return True if entity is available."""
        coordinator: BTHomePassiveBluetoothProcessorCoordinator = self.processor.coordinator
        return coordinator.device_data.sleepy_device or super().available

Leaving as draft until the following can be made

[bdraco]

Looks good. I think we can copy the xiaomi ble test and modify it a bit and than this is good to go

[Ernst79]

I’ll take care of Xiaomi-ble in a separate PR

[bdraco]

I think we still need the test that it is treated as sleepy there though.

[Ernst79]

Ah, sorry, I wasn't reading right, I thought you said we should copy this change to xiaomi-ble, but you meant copying the tests from xiaomi-ble to bthome for the sleepy_devices.

I have added the tests.

[bdraco]

Thanks @Ernst79

Looks much better now 👍