[Core] Support dynamically loading Lora adapter from HuggingFace (#6234)

Co-authored-by: Antoni Baum <antoni.baum@protonmail.com>

tests/lora/conftest.py

@@ -159,8 +159,14 @@ def dummy_model_gate_up() -> nn.Module:
 
 
 @pytest.fixture(scope="session")
-def sql_lora_files():
-    return snapshot_download(repo_id="yard1/llama-2-7b-sql-lora-test")
+def sql_lora_huggingface_id():
+    # huggingface repo id is used to test lora runtime downloading.
+    return "yard1/llama-2-7b-sql-lora-test"
+
+
+@pytest.fixture(scope="session")
+def sql_lora_files(sql_lora_huggingface_id):
+    return snapshot_download(repo_id=sql_lora_huggingface_id)
 
 
 @pytest.fixture(scope="session")