Add admin command tests for logRotate

[vic-tsang]

This PR contains:

• admin command tests for logRotate
• execute_admin_with_retry_command: added a retry mechanism for execute_admin_command. Without the retry mechanism, the first test would be pass but subsequent tests would fail.

Background:

• When logRotate runs, it renames the active log file to an archive name built from the
  current timestamp with one-second resolution, e.g. my_server_log.2026-06-24T17-18-27. The rename target is fully determined by the wall-clock second.
• If two rename happens within the same second, they would both have the same name and one of the rename will fail.

Discussion Points:

• Audit log is skipped as it needs a special flag for the server. Please let me know if it worthwhile to enable for one test case.

Ref:

• Issue Add compatibility test for logRotate #426

[documentdb-triage-tool]

🤖 Auto-triaged by documentdb-triage-tool.

Applied: compatibility test, enhancement
Project fields suggested: Component test-coverage · Priority P2 · Effort L · Status Needs Review
Confidence: 0.30 (deterministic)

Reasoning

component from path globs (test-coverage, test-framework); effort from diff stats (263+10 LOC, 10 files); LLM failed: Invalid response body while trying to fetch https://api.anthropic.com/v1/messages: Premature close

If a label is wrong, remove it manually and ping @patty-chow so the rules can be tuned. The bot will not re-label items that already have component labels.

[SaiPradyumn]

Other admin command tests (killOp, getParameter) assert "comment": NotExists() in the response. Here only {"ok": 1.0} is checked. Add NotExists() to verify the comment is consumed and not echoed back

[SaiPradyumn]

Missing: does an unrecognized field still fail when a valid comment is also present?