Add support for Tuya 2 gang relay _TZ3000_m8f3z8ju

[peper0]

Proposed change

Additional information

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 88.27%. Comparing base (24217a3) to head (d1bec69).
Report is 34 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3113      +/-   ##
==========================================
+ Coverage   88.10%   88.27%   +0.16%     
==========================================
  Files         299      302       +3     
  Lines        9358     9447      +89     
==========================================
+ Hits         8245     8339      +94     
+ Misses       1113     1108       -5     

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[TheJulianJES]

I think this should be fine. Thanks!