Only ask for `crossing:light` on tram crossings if `crossing:signals=no`

[wielandb]

This PR splits the condition for the crossing:light question into seperate conditions for normal and tram crossings, with the tram crossing having the additional condition that crossing:signals must be no.

[wielandb]

We should introduce tram questions for the following tags like we already have for highway crossings.

As far as I can see, all theese questions are already asked for tram_crossings. 🤔

[Robbendebiene]

In a recent PR keys and strings containing traffic light were renamed to pedestrian lights so we should move away from traffic signals here as well.

Since the warning light is not a real pedestrian light I kinda prefer "Tram crossing light signal"/ tramCrossingLightSignalName or "Tram crossing signal lights"/ tramCrossingSignalLightsName

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Resolution:

• Use signal lights in text as a replacement for "traffic light"
• Use SignalLights in keys as a replacement for TrafficSignal

So "tramCrossingTrafficSignalName": "Tram crossing traffic signal", Becomes: "tramCrossingSignalLightsName": "Tram crossing signal lights",

[wielandb]

Closing this in favour of the much cleaner #239