[Perf][CI] Reuse the Whisper judge worker across a test module (#6208)

Signed-off-by: Shenglei Fu <sfu@confluent.io>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

tests/conftest.py

@@ -21,6 +21,7 @@ pytest_plugins = (
     "tests.helpers.fixtures.config",
     "tests.helpers.fixtures.env",
     "tests.helpers.fixtures.log",
+    "tests.helpers.fixtures.media",
     "tests.helpers.fixtures.run_args",
     "tests.helpers.fixtures.runtime",
     "tests.helpers.fixtures.speaker_cache",