Flaky test: tests/sentry/api/helpers/test_group_index.py::MergeGroupsTest::test_metrics

[github-actions]

Failing test: tests/sentry/api/helpers/test_group_index.py::MergeGroupsTest::test_metrics
Sentry sha: ca860f9
Run: https://github.com/getsentry/sentry/actions/runs/22268328495

�[1m�[31mtests/sentry/api/helpers/test_group_index.py�[0m:586: in test_metrics
    mock_metrics_incr.assert_any_call(
�[1m�[31m/opt/hostedtoolcache/Python/3.13.1/x64/lib/python3.13/unittest/mock.py�[0m:1048: in assert_any_call
    raise AssertionError(
�[1m�[31mE   AssertionError: incr('grouping.merge_issues', sample_rate=1.0, tags={'platform': 'javascript', 'referer': 'issue stream', 'sdk': 'sentry.javascript.nextjs'}) call not found�[0m

[linear]

ENG-6681