feat(wasmbindings): update metadata of a different contract

[chris-ricketts]

Allows a contract A to update the rewards metadata of contract B, if contract A's address matches the OwnerAddress of contract B.

Closes #321

[codecov]

Codecov Report

Patch coverage: 85.71% and project coverage change: +0.07 🎉

Comparison is base (6fceed8) 69.55% compared to head (9eaa514) 69.63%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #326      +/-   ##
==========================================
+ Coverage   69.55%   69.63%   +0.07%     
==========================================
  Files          63       63              
  Lines        3758     3777      +19     
==========================================
+ Hits         2614     2630      +16     
- Misses       1068     1070       +2     
- Partials       76       77       +1     

Impacted Files	Coverage Δ
wasmbinding/rewards/types/msg_metadata.go	50.94% <76.92%> (+8.44%)	⬆️
wasmbinding/rewards/msg_handler.go	87.50% <100.00%> (+1.78%)	⬆️

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[chris-ricketts]

@aelesbao fixed merge conflict that came up with 6fceed8

Latest forced-push contains newly built contracts/go/voter/code.wasm that satisfies @fdymylja's new tests and the tests added in this PR.

I'm afraid the 1 failing check on this PR is out of my control.

[aelesbao]

@chris-ricketts thanks for the update. The Docker build will fail in your fork because it doesn't have the credentials for Docker Hub, which is fine.

[aelesbao]

I pushed a small style change to the handler, but it LGTM.