Simplify time zone setting in tests (#68330)
* Simplify timezone setting in tests
* Fix typo
* Adjust caldav tests
* Adjust input_datetime tests
* Adjust time_date tests
* Adjust tod tests
* Adjust helper tests
* Adjust recorder tests
* Adjust risco tests
* Adjust aemet tests
* Adjust flux tests
* Adjust forecast_solar tests
* Revert unnecessary change in forecast_solar test
* Adjust climacell tests
* Adjust google tests
* Adjust sensor tests
* Adjust sonarr tests
* Adjust template tests
* Adjust zodiac tests
Co-authored-by: Martin Hjelmare <marhje52@gmail.com>
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