feat: Use pytest-xdist for test parallelization

PiperOrigin-RevId: 829926138

Author: speedstorm1

pyproject.toml

@@ -55,3 +55,7 @@ plugins = ["pydantic.mypy"]
 # 'import-not-found' and 'import-untyped' are environment specific
 disable_error_code = ["import-not-found", "import-untyped", "unused-ignore"]
 strict = true
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "function"

requirements.txt

@@ -21,7 +21,7 @@ pydantic_core==2.41.1
 pytest==8.3.4
 pytest-asyncio==0.25.0
 pytest-cov==6.0.0
-pytest-parallel==0.1.1
+pytest-xdist==3.8.0
 requests==2.32.4
 rsa==4.9
 tenacity==8.2.3