Add option to allow to use setpoint instead of override for legacy incomfort RF gateway

[jbouwh]

Proposed change

Some older InComfort RF Gateways do not reset the override setting after the setpoint of a climate has changed manually. In that case the changed setpoint is not updated in Home Assistant. To work-a-round this issue this PR adds an option that allows to return the setpoint instead of the override. As side effect is though that when the setpoint is changed using the override, it will take some time for the climate to show the correct setpoint as the override attribute will be ignored.

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: Thermostat temperature is wrong within HA jbouwh/incomfort-client#40
• Link to documentation pull request: Document legacy setpoint handling for incomfort integration home-assistant.io#36819

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 Ruff (ruff format 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.

To help with the load of incoming pull requests:

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

[joostlek]

Some older InComfort RF Gateways

Is it possible to detect this?

[jbouwh]

Some older InComfort RF Gateways

Is it possible to detect this?

We can detect a serial number but cannot decide on the software version at the moment.
Also it is not clear what software version works, and which one does not.

[home-assistant]

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