[NoahStapp]

… flaky due to configuring its failpoint through a client with timeout options

PYTHON-6123

Changes in this PR

Implements DRIVERS-3659.

Test Plan

Existing test changes.

Checklist

Checklist for Author

• Did you update the changelog (if necessary)?
• Is there test coverage?
• Is any followup work tracked in a JIRA ticket? If so, add link(s).

Checklist for Reviewer

• Does the title of the PR reference a JIRA Ticket?
• Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
• Is all relevant documentation (README or docstring) updated?

[Copilot]

🟢 Approval recommended

No active review issues are reported for the change isolating failpoint setup from the timeout-configured test client.

No open issues 🎉

What changed in this PR

Reduces flakiness in the transactions unified test by separating failpoint configuration from the client with timeout options.

Changes:

• Adds a dedicated failPointClient with useMultipleMongoses disabled.
• Uses that client to configure the failpoint instead of client0.

File	Description
test/​transactions/​unified/​error-labels-blockConnection.json	Isolates failpoint setup from the timeout-configured test client.

_{Review effort: Balanced}