test: migrate e2e/genutil to systemtest (backport #22325)

[mergify]

Description

Closes: #21871

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Summary by CodeRabbit

• Tests
  • Introduced new tests for the export command, validating behavior with height parameters and output file specifications.
  • Removed an outdated test file that previously covered export command functionality.
• Chores
  • Added a constant for maximum gas limit to improve maintainability in system tests.
  • Updated module dependencies to align with the latest developments in the Cosmos SDK testing environment.

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This is an automatic backport of pull request #22325 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of aa4614e has failed:

On branch mergify/bp/release/v0.52.x/pr-22325
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit aa4614e48.
  (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:
	deleted:    tests/e2e/genutil/export_test.go
	new file:   tests/systemtests/export_test.go
	modified:   tests/systemtests/system.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tests/go.mod

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

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