fix(ibc-core): copy substitute consensus state during client recovery

[seanchen1991]

Closes: #1196

Description

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PR author checklist:

• [ ] Added changelog entry, using unclog.
• [x] Added tests.
• [x] Linked to GitHub issue.
• [x] Updated code comments and documentation (e.g., docs/).
• [x] 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[bot]]

Codecov Report

Attention: Patch coverage is 97.91667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 64.41%. Comparing base (23b26bb) to head (dda0187).

:exclamation: Current head dda0187 differs from pull request most recent head 6f52da0. Consider uploading reports for the commit 6f52da0 to get more accurate results

Files	Patch %	Lines
...stkit/src/testapp/ibc/clients/mock/client_state.rs	93.75%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1197 +/- ## ========================================== + Coverage 64.33% 64.41% +0.07% ========================================== Files 229 230 +1 Lines 22083 22112 +29 ========================================== + Hits 14208 14243 +35 + Misses 7875 7869 -6 ```

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