tests: runtime: Try to address test hang

[cosmo0920]

Previously, out_forward runtime test hangs i\on some of the Linux environment.
This PR fixes this phenomenon.

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Testing
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Backporting

• Backport to latest stable release.

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

Summary by CodeRabbit

• Tests
  • Updated secure forward test settings to include worker and retry configuration for oversized pong handling.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4f1546f2-8bf1-4ee1-9397-33b8f6e2baf2

📥 Commits

Reviewing files that changed from the base of the PR and between c2b1cfd and fd7788a.

📒 Files selected for processing (1)

• tests/runtime/out_forward.c

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📝 Walkthrough

Walkthrough

The secure-forward runtime test now configures the forward output with workers=1 and retry_limit=no_retries. No other test logic changed.

Changes

Forward runtime test setup

Layer / File(s)	Summary
Forward output options tests/runtime/out_forward.c	The flb_test_secure_forward_oversized_pong_reason setup adds workers set to 1 and retry_limit set to no_retries on the forward output.

Estimated review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• fluent/fluent-bit#11945: Modifies the same runtime forward test area and is closely related to the secure-forward test setup.

Suggested reviewers

• edsiper

Poem

I hopped by the forward test,
With workers=1, it felt well-pressed.
No retries now on pongy trails,
Just tidy paths through runtime veils.
A carrot toast for tests that gleam,
🐰✨ in one small, sturdy scheme.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the change intent: a runtime test update to address a hang in the forward test.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cosmo0920-address-unit-testing-hang

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