Add Tuya Thermostat _TZE204_mpbki2zm

[prairiesnpr]

Proposed change

Adds _TZE204_mpbki2zm

Based on: https://github.com/Koenkk/zigbee-herdsman-converters/blob/b79bc945d477ca118280537cb075798ea49cd5b9/src/devices/tuya.ts#L11313

Additional information

Closes: #2529

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

Attention: Patch coverage is 95.23810% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.40%. Comparing base (d9481d3) to head (1756bfa).
Report is 13 commits behind head on dev.

Files with missing lines	Patch %	Lines
zhaquirks/tuya/ts0601_thermostat.py	95.23%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #3775   +/-   ##
=======================================
  Coverage   90.40%   90.40%           
=======================================
  Files         320      320           
  Lines       10490    10509   +19     
=======================================
+ Hits         9483     9501   +18     
- Misses       1007     1008    +1     

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