fix: index ante events for failed tx

[yihuang]

Description

Currently the ante events for failed tx are not indexed at all, but ethermint need to rely on them to find some failed txs in json-rpc apis.

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Author Checklist

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I have...

• included the correct type prefix in the PR title
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• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
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Reviewers Checklist

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• confirmed the correct type prefix in the PR title
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• reviewed state machine logic
• reviewed API design and naming
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[codecov]

Codecov Report

Merging #12013 (4a68e0f) into main (d416ee8) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main   #12013   +/-   ##
=======================================
  Coverage   65.97%   65.97%           
=======================================
  Files         671      671           
  Lines       70959    70959           
=======================================
+ Hits        46815    46816    +1     
+ Misses      21490    21488    -2     
- Partials     2654     2655    +1     

Impacted Files	Coverage Δ
baseapp/abci.go	64.05% <100.00%> (ø)
x/group/keeper/keeper.go	54.85% <0.00%> (+0.42%)	⬆️