Supply app version to contract keeper

[chatton]

Description

closes: #6977

This PR adds the underlying application version to the callback data and propagates it to the contract keeper interface fns.

---

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• Wrote unit and integration tests.
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[sonarqubecloud]

Quality Gate failed for 'ibc-go'

Failed conditions
61.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud

[colin-axner]

No backport necessary, this should be included in the callbacks release branch (when created)

[colin-axner]

Thanks @chatton for an elegant solution here!

[DimitrisJim]

changes look good to me! Thanks both for smashing this final issue through!