feat(x/rewards): Disallow setting module accounts as reward addresses

[fdymylja]

No description provided.

[codecov]

Codecov Report

Patch coverage: 81.25% and project coverage change: +0.04 🎉

Comparison is base (92abf73) 69.39% compared to head (15e80bf) 69.44%.

❗ Current head 15e80bf differs from pull request most recent head efcc433. Consider uploading reports for the commit efcc433 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #356      +/-   ##
==========================================
+ Coverage   69.39%   69.44%   +0.04%     
==========================================
  Files          65       65              
  Lines        3843     3858      +15     
==========================================
+ Hits         2667     2679      +12     
- Misses       1090     1092       +2     
- Partials       86       87       +1     

Impacted Files	Coverage Δ
x/rewards/keeper/keeper.go	90.90% <ø> (ø)
x/rewards/keeper/metadata.go	94.91% <80.00%> (-5.09%)	⬇️
app/app.go	90.65% <100.00%> (ø)

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