[Flaky test] `lms/djangoapps/commerce/tests/__init__.py::DeprecatedRestApiClientTest::test_tracking_context`

This test fails intermittently and has been deleted according to the Flaky Test Process in https://github.com/openedx/edx-platform/pull/35094

See docs on how to address flaky tests for why this should be fixed and how to go about it.

• Failing run: https://github.com/openedx/edx-platform/actions/runs/9806108942/job/27077153987 (attempt #1 on tests for 57dd213 on 2024-07-08)
• Passing run: https://github.com/openedx/edx-platform/actions/runs/9806108942/job/27170780934 (attempt #2)
• Previously failed in a flaky way on 7da377e on 2024-07-03

Failure output:

FAILED lms/djangoapps/commerce/tests/__init__.py::DeprecatedRestApiClientTest::test_tracking_context - requests.exceptions.ConnectionError: HTTPSConnectionPool(host='ecommerce.example.com', port=443): Max retries exceeded with url: /api/v2/baskets/1/ (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f0708b91f50>: Failed to establish a new connection: [Errno -2] Name or service not known'))

(Previously filed as https://2u-internal.atlassian.net/browse/CR-6899)

Start with lms/djangoapps/commerce/tests/init.py::DeprecatedRestApiClientTest::test_tracking_context and compare the failing and passing workflow runs linked in the issue. Review the flaky-test process guidance, then make the test reliable against the reported ecommerce.example.com connection failure and verify it passes consistently.