test: add pytest-asyncio dependency

The new scheduler uses an async model, so it's helpful for testing to
pull in the asyncio pytest plugin.

Signed-off-by: Alex Jones <alex.jones@lowrisc.org>

Author: AlexJones0

pyproject.toml

@@ -43,6 +43,7 @@ debug = [
 test = [
     "pyhamcrest>=2.1.0",
     "pytest>=8.3.3",
+    "pytest-asyncio>=1.3.0",
     "pytest-cov>=5.0.0",
     "pytest-timeout>=2.4.0",
     "pytest-repeat>=0.9.4",