fix: remove asynchronous model for distributed client

[coroa]

Changes proposed in this Pull Request

Fixup of #2137 , I took Client(asynchronous=True) from build_daily_heat_demand and build_temperature_profiles without investigating what it does.

https://distributed.dask.org/en/stable/api.html#client :

asynchronous: bool (False by default)
    Set to True if using this client within async/await functions or within Tornado 
    gen.coroutines. Otherwise this should remain False for normal use.

We and atlite are not running our own async event loop so this should always be False for us.

Checklist

Required:

• Changes are tested locally and behave as expected.
• Code and workflow changes are documented.
• A release note entry is added to doc/release_notes.rst.

If applicable:

• Changes in configuration options are reflected in scripts/lib/validation.
• For new data sources or versions, these instructions have been followed.
• New rules are documented in the appropriate doc/*.rst files.

[fneum]

I trust you on that :)