move shared pytest conftest to top level tests (#2099) [skip ci]

* move shared pytest conftest to top level tests

* add __init__ so mypy doesn't choke on multiple conftests

tests/conftest.py

@@ -0,0 +1,35 @@
+"""
+shared pytest fixtures
+"""
+import shutil
+import tempfile
+
+import pytest
+from huggingface_hub import snapshot_download
+
+
+@pytest.fixture(scope="session", autouse=True)
+def download_smollm2_135m_model():
+    # download the model
+    snapshot_download("HuggingFaceTB/SmolLM2-135M")
+
+
+@pytest.fixture(scope="session", autouse=True)
+def download_tatsu_lab_alpaca_dataset():
+    # download the model
+    snapshot_download("tatsu-lab/alpaca", repo_type="dataset")
+
+
+@pytest.fixture(scope="session", autouse=True)
+def download_mhenrichsen_alpaca_2k_dataset():
+    # download the model
+    snapshot_download("mhenrichsen/alpaca_2k_test", repo_type="dataset")
+
+
+@pytest.fixture
+def temp_dir():
+    # Create a temporary directory
+    _temp_dir = tempfile.mkdtemp()
+    yield _temp_dir
+    # Clean up the directory after the test
+    shutil.rmtree(_temp_dir)