PYTHON-6004 Scope OIDC test failpoints to the auth_oidc appName

[blink1073]

PYTHON-6004

Changes in this PR

The OIDC auth tests used failCommand with appName as a top-level configureFailPoint field, which the server ignores. The failpoint was unscoped, so it could fire on the wrong connection and the reauthentication tests (test_4_1, test_4_2) flaked on Atlas-backed OIDC environments.

• Scoped the OIDC failpoints to the auth_oidc client by moving appName into data.
• Added appName=auth_oidc to MONGODB_URI_SINGLE so test clients advertise that name in every environment, including k8s.

Test Plan

Ran the OIDC tasks on Evergreen. Passing build, executed twice. ### TODO

Checklist

Checklist for Author

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

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

The focused changes correctly scope failpoints and consistently configure matching client metadata.

Pull request overview

Scopes OIDC failpoints to test clients, preventing unrelated connections from consuming one-shot failures.

Changes:

• Moves failpoint appName filtering into data.
• Adds auth_oidc to single-client URIs across OIDC environments.
• Keeps synchronous and asynchronous tests aligned.

File summaries

File	Description
.evergreen/scripts/oidc_tester.py	Configures OIDC app names in test environments.
test/asynchronous/test_auth_oidc.py	Scopes asynchronous OIDC failpoints.
test/test_auth_oidc.py	Mirrors the asynchronous test change.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Balanced

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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