Bump ibc-proto to v0.30.0 and tendermint to v0.31

[kevinji]

Description

This PR bumps ibc-proto to v0.30.0 and tendermint to v0.31. This should be compatible with tower-abci v0.7.0 which also bumps tendermint to v0.31.

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PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (f97432f) 73.02% compared to head (751b89a) 73.02%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #689   +/-   ##
=======================================
  Coverage   73.02%   73.02%           
=======================================
  Files         113      113           
  Lines       15298    15298           
=======================================
  Hits        11171    11171           
  Misses       4127     4127           

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[plafer]

🙏