Fix wrong float-integer conversion for temp values

[loeffelpan]

Temperature values were converted to int instead of float (e. g. 21.5 -> 21.0)
This fixes that wrong conversion and uses float instead of int.

Additionally I found some wrong exeptions messages during my tests.
skodaconnect/homeassistant-skodaconnect#122 will fix this for custom-component.

[loeffelpan]

One thing to mention:
During my tests I tried to set climater temp with a set_timers action. It seems, that the API ignores this.
Timer was set properly but climater temp stays as before despite the request was succeeded.

Request JSON:

Request for "https://fal-3a.prd.eu.dp.vwg-connect.com/fs-car/bs/departuretimer/v1/skoda/CZ/vehicles/TMBJW9NP8L7030632/timer/actions" returned with status code [202], response: [...] , 'timerBasicSetting': {'heaterSource': 'electric', 'chargeMinLimit': '0', 'targetTemperature': '2945'}}}, 'rate_limit_remaining': '9'}

Request:

Request for "https://fal-3a.prd.eu.dp.vwg-connect.com/fs-car/bs/departuretimer/v1/skoda/CZ/vehicles/TMBJW9NP8L7030632/timer/actions/537533296" returned with status code [200], response: {'action': {'type': 'setTimersAndProfiles', 'actionId': '537533296', 'actionState': 'succeeded'}}

Response JSON:

Request for "https://fal-3a.prd.eu.dp.vwg-connect.com/fs-car/bs/climatisation/v1/skoda/CZ/vehicles/TMBJW9NP8L7030632/climater" returned with status code [200], response: {'climater': {'settings': {'targetTemperature': {'timestamp': datetime.datetime(2022, 6, 9, 9, 4, 12, tzinfo=datetime.timezone.utc), 'content': 2955}, [...]