chore: add `into_inner()` for ICS07 `ConsensusState`

[Farhad-Shabani]

Description

• Adds an into_inner() method for the ICS07 ConsensusState, so that dependent projects won't need to perform redundant cloning.
• Removes redundant cloning within the IC07 check_substitute implementation.

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PR author checklist:

• [x] Added changelog entry, using unclog.
• [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 0% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 63.84%. Comparing base (d4c3655) to head (c579628).

Files	Patch %	Lines
...ts/ics07-tendermint/src/client_state/validation.rs	0.00%	6 Missing :warning:
...bc-clients/ics07-tendermint/src/consensus_state.rs	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1156 +/- ## ========================================== - Coverage 63.85% 63.84% -0.01% ========================================== Files 219 219 Lines 21359 21362 +3 ========================================== Hits 13638 13638 - Misses 7721 7724 +3 ```

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