[DNM] feat(baseapp): refactor runTx

[fedekunze]

Description

Follow-up of #13940
Closes: #13942

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Author Checklist

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• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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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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• reviewed tests and test coverage
• manually tested (if applicable)

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tac0turtle]

closing this as part of the 1 month open pr policy