Fix the flaky yamlRestTest caused by order of sample_logs

[LantaoJin]

Description

Patterns with specified max_sample_count should return correct result is flaky

Related Issues

Resolves #5118

Check List

• New functionality includes testing.
• New functionality has been documented.
• New functionality has javadoc added.
• New functionality has a user manual doc added.
• New PPL command checklist all confirmed.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff or -s.
• Public documentation issue/PR created.

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[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Tests
  • Updated integration test setup to explicitly configure index creation and shard/replica settings before data indexing.

Walkthrough

A test configuration file is updated to add an explicit index creation step with specific shard and replica settings in the setup section, preparing the test environment before bulk document indexing.

Changes

Cohort / File(s)	Summary
Test Setup Configuration integ-test/src/yamlRestTest/resources/rest-api-spec/test/issues/4866.yml	Added indices.create operation in setup section to create hdfs_logs index with explicit shard and replica settings before bulk indexing.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly refers to fixing flaky yamlRestTest caused by order of sample_logs, which directly matches the changeset that adds index creation to ensure deterministic ordering.
Description check	✅ Passed	The description references the flaky test and issue #5118, which directly relates to the non-deterministic ordering problem addressed by the changeset.
Linked Issues check	✅ Passed	The PR adds index creation with explicit shard/replica settings to ensure deterministic test execution, directly addressing issue #5118's root cause of non-deterministic sample_logs ordering.
Out of Scope Changes check	✅ Passed	The single change adds necessary index setup configuration to the test file, which is directly in scope for fixing the flaky test described in issue #5118.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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