Fix Tuya 3 gang switch TS0601 _TZE200_vhy3iakz

[rasmus-hagberg]

Proposed change

Mark the TS0601 _TZE200_vhy3iakz device as a 3 gang switch instead of a 1 gang switch.

Additional information

I purchased a 3 gang "Tuya Smart ZigBee Push Switch" from here. In HA the manufacturer is "_TZE200_vhy3iakz" and the model is "TS0601". It uses the ts0601_switch.TuyaSingleSwitchTO quirk, and so I was only able to control the first switch.

Multi gang quirks for tuya switches were added in this PR, which notes that "For those devices whose number of gangs is not clear, they have been defined as 1-gang devices until someone report correct info" and "we have doubts about [the _TZE200_vhy3iakz] device".

I tried the changes by loading them as a custom quirk, and it works fine for me. I am now able to control all three switches remotely, and the status is updated properly in HA.

Checklist

• The changes are tested and work correctly
• pre-commit checks pass / the code has been formatted using Black
• Tests have been added to verify that the new code works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.85%. Comparing base (fc1e55f) to head (3c6c7fe).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #3004   +/-   ##
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  Coverage   87.85%   87.85%           
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  Files         301      301           
  Lines        9217     9217           
=======================================
  Hits         8098     8098           
  Misses       1119     1119           

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[TheJulianJES]

Thanks!