[3.11] gh-68403: Fix test_coverage in test_trace (GH-108910) (GH-109105)

Its behavior no longer affected by test running options such as -m.
(cherry picked from commit 7e1a7abb9831965cdec477e62dbe4f8415b8a582)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>