fix(server/v2/cometbft): wire app closer (backport #22240)

[mergify]

Description

Closes: #XXXX

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• confirmed the correct type prefix in the PR title
• confirmed all author checklist items have been addressed
• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage

Summary by CodeRabbit

• New Features

  • Introduced a new lifecycle management capability for the application with the addition of a closure for cleanup operations.
  • Expanded command-line interface with a new command for bootstrapping state.
  • Added methods for store access and application closure management in the SimApp.

• Improvements

  • Enhanced resource management by ensuring proper closure of database connections.

• Bug Fixes

  • Enhanced error handling in the testing framework to ensure robust validation of consensus methods.

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This is an automatic backport of pull request #22240 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 0b43fcc has failed:

On branch mergify/bp/release/v0.52.x/pr-22240
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit 0b43fcc21.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   server/v2/cometbft/abci.go
	modified:   server/v2/cometbft/abci_test.go
	modified:   server/v2/cometbft/server.go
	modified:   simapp/v2/app_di.go
	modified:   tools/confix/data/v2-app.toml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   server/v2/testdata/app.toml
	deleted by us:   server/v2/types.go
	deleted by us:   store/v2/commitment/metadata.go
	deleted by us:   store/v2/root/factory.go
	deleted by us:   store/v2/root/migrate_test.go
	deleted by us:   store/v2/root/store.go
	deleted by us:   store/v2/root/store_test.go
	deleted by us:   store/v2/root/upgrade_test.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[github-actions]

@mergify[bot] your pull request is missing a changelog!