Refactor Tuya spell tests

[TheJulianJES]

Proposed change

This moves spell-related Tuya tests from test_tuya.py to test_tuya_spells.py.

(The diff may look huge, but there are no code changes, other than moving the tests.)

Additional information

This moves Tuya spells tests as mentioned in this related PR:

• Refactor Tuya spell implementation, add Tuya query data spell #2940

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 ✅

Comparison is base (c55555e) 87.62% compared to head (21f3ddf) 87.62%.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #2941   +/-   ##
=======================================
  Coverage   87.62%   87.62%           
=======================================
  Files         295      295           
  Lines        9045     9045           
=======================================
  Hits         7926     7926           
  Misses       1119     1119           

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