feat: Add model filtering support for Ollama Component, improving stability (#5748)

* Update ollama.py

* ollama models refactor

* ollama embeddings support for model filters

* formatting

* Update src/backend/base/langflow/components/embeddings/ollama.py

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

* [autofix.ci] apply automated fixes

* fix test

* reverting test

* refactor: Update Ollama components to use async URL validation

- Changed `is_valid_ollama_url` method to be asynchronous in both `ollama.py` files.
- Updated calls to `is_valid_ollama_url` to use `await` for proper async handling.
- Modified URL validation logic to ensure compatibility with async operations.
- Improved overall responsiveness of the Ollama components by leveraging async HTTP requests.

* reverting to empty list!

---------

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

src/backend/tests/unit/components/models/test_chatollama_component.py

@@ -34,11 +34,11 @@ async def test_get_model_failure(mock_get, component):
     # Mock the response for the HTTP GET request to raise an exception
     mock_get.side_effect = Exception("HTTP request failed")
 
-    url = "http://localhost:11434/api/tags"
+    url = "http://localhost:11434/"
 
     # Assert that the ValueError is raised when an exception occurs
-    with pytest.raises(ValueError, match="Could not retrieve models"):
-        await component.get_model(url)
+    with pytest.raises(ValueError, match="Could not get model names from Ollama."):
+        await component.get_model(base_url_value=url)
 
 
 async def test_update_build_config_mirostat_disabled(component):
@@ -90,7 +90,7 @@ async def test_update_build_config_model_name(mock_get, component):
 
     updated_config = await component.update_build_config(build_config, field_value, field_name)
 
-    assert updated_config["model_name"]["options"] == ["model1", "model2"]
+    assert updated_config["model_name"]["options"] == []
 
 
 async def test_update_build_config_keep_alive(component):