auto-docs: Update K8s acceptance tests

[vbotbuildovich]

This PR auto-updates the acceptance tests we use as examples in our Kubernetes docs.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds three new end-to-end test scenarios to the RedpandaRole Kubernetes acceptance tests. The scenarios validate internal role creation with member management, ACL configuration for internal roles, and the promotion of a regular role to an internal role while preserving ACLs. Each scenario includes setup steps, Kubernetes manifest application, synchronization validation, and authorization checks using the same test framework patterns.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• auto-docs: Update K8s acceptance tests #1445 — Modifies the same Kubernetes role CRD acceptance tests file with overlapping role and authorization scenarios

Suggested reviewers

• JakeSCahill

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is minimal and lacks required template sections. It's missing JIRA ticket reference, review deadline, page previews, and categorization checkboxes specified in the template.	Add the missing template sections: include the JIRA ticket link, review deadline, page previews for the affected documentation, and check the appropriate category box (appears to be Content gap or Small fix).

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'auto-docs: Update K8s acceptance tests' directly describes the main change: updating Kubernetes acceptance tests. It is concise, specific, and clearly communicates the primary purpose of the PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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