Set PARALLEL_UPDATES for incomfort entity platforms

[jbouwh]

Proposed change

The incomfort integrations uses a datacoordinator, so it's entity platforms should set PARALLEL_UPDATES = 0.
The climate platform is set to PARALLEL_UPDATES = 1 because multiple climate controls may be supported, and the gateway is not to be expected parallel updates. The water_heater does not allow controlling the temperature.

https://developers.home-assistant.io/docs/core/integration-quality-scale/rules/parallel-updates/

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