Track newly added CIS test cases in cis_spec.rb whitelist

[karthickaliappa]

Summary

PR #702 added CIS hardening assertions for SSH MaxStartups (CIS-5.1.18), sudo use_pty (CIS-5.2.2), sudo logfile (CIS-5.2.3), and shell TMOUT (CIS-5.4.3.2).

These test descriptions were annotated with (CIS-...) tags, which are dynamically tracked into $cis_test_cases by spec/support/cis.rb during spec execution. However, base_cis_test_cases in spec/stemcells/cis_spec.rb was not updated to include these 4 new test cases, causing CI pipeline verification failures across IAAS builds on ubuntu-jammy.

This PR updates base_cis_test_cases in cis_spec.rb to include all 4 missing CIS rule IDs.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 2fcec5d4-f596-4435-81a3-a20871076a1d

📥 Commits

Reviewing files that changed from the base of the PR and between ffc5fb1 and c00b4ad.

📒 Files selected for processing (1)

• bosh-stemcell/spec/stemcells/cis_spec.rb

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Walkthrough

The base CIS test case list now includes CIS-5.1.18, CIS-5.2.2, CIS-5.2.3, and CIS-5.4.3.2. Existing entries remain unchanged.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding newly introduced CIS test cases to the whitelist.
Description check	✅ Passed	The description explains the cause, affected branch, four added CIS IDs, and the CI failure resolved by the change.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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