refactor(genutil): Use sdk types genesis validator (backport #21678)

[mergify]

Description

follow up to: #21382

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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 interface for handling public keys from JSON data.
  • Enhanced the application state export to include consensus validators.
  • Added functionality for migrating legacy genesis files to a new format.
  • Integrated staking functionalities into the application.
  • Added new methods for querying application state based on specific versions.
  • Improved compatibility with the Cosmos SDK through standardized validator handling.

• Bug Fixes

  • Improved robustness in handling validator initialization during tests.

• Refactor

  • Simplified validator handling by replacing custom structures with standardized SDK types.
  • Streamlined the export process for genesis files.
  • Enhanced state management capabilities with new query functionality.

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This is an automatic backport of pull request #21678 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 4aeb053 has failed:

On branch mergify/bp/release/v0.52.x/pr-21678
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit 4aeb05392.
  (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:
	new file:   crypto/codec/pubkey.go
	new file:   crypto/keys/jsonkey.go
	modified:   server/types/app.go
	modified:   simapp/export.go
	modified:   simapp/v2/export.go
	modified:   tests/e2e/genutil/export_test.go
	modified:   types/staking.go
	modified:   x/genutil/client/cli/migrate.go
	new file:   x/genutil/migration/v052/migrate.go
	new file:   x/genutil/migration/v052/migrate_test.go
	new file:   x/genutil/migration/v052/testdata/old_app_genesis.json
	modified:   x/genutil/types/genesis.go
	modified:   x/genutil/types/testdata/app_genesis.json
	modified:   x/genutil/utils.go
	modified:   x/genutil/v2/cli/export.go
	modified:   x/genutil/v2/types.go
	modified:   x/staking/genesis.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   runtime/v2/app.go
	deleted by us:   runtime/v2/builder.go
	deleted by us:   runtime/v2/manager.go
	deleted by us:   runtime/v2/services/genesis.go
	both modified:   simapp/v2/app_di.go
	both modified:   simapp/v2/app_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

[julienrbrt]

I can do the partial backport