Add innr SP-242 plug quirk

[mgjbroadbent]

Proposed change

Quirk for the inner SP-242 plug that updates the MeteringCluster to use the existing MeteringClusterInnr. This adds a divisor for the summed energy usage to report correct usage.

Additional information

Tested in HA as a custom quirk against an SP-242.

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 89.87%. Comparing base (979551d) to head (88a3ed8).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3611      +/-   ##
==========================================
+ Coverage   89.85%   89.87%   +0.01%     
==========================================
  Files         321      322       +1     
  Lines       10374    10387      +13     
==========================================
+ Hits         9322     9335      +13     
  Misses       1052     1052              

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