test: fix sims (backport #21735)

[mergify]

Description

Fixes sims failure: https://github.com/cosmos/cosmos-sdk/actions/runs/10869330913/job/30160410518#logs
Fixes job to wait for that seems (CI was sending a wrong success notification on Slack)

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Summary by CodeRabbit

• New Features

  • Added test-sim-deterministic as a dependency for success and failure notification jobs, enhancing workflow robustness.

• Bug Fixes

  • Improved error handling in the GetString method to prevent runtime errors when accessing map values and type assertions.

These changes contribute to a more reliable and stable testing workflow.

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This is an automatic backport of pull request #21735 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 0147347 has failed:

On branch mergify/bp/release/v0.52.x/pr-21735
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit 01473479c.
  (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:   .github/workflows/sims.yml
	modified:   server/util_test.go
	modified:   testutils/sims/runner.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   .github/workflows/sims-052.yml

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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