Community[patch]use secret str in Tavily and HuggingFaceInferenceEmbeddings (#16109)

So the api keys don't show up in repr's 

Still need to do tests

libs/community/tests/unit_tests/embeddings/test_huggingface.py

@@ -0,0 +1,7 @@
+from langchain_community.embeddings.huggingface import HuggingFaceInferenceAPIEmbeddings
+
+
+def test_hugginggface_inferenceapi_embedding_documents_init() -> None:
+    """Test huggingface embeddings."""
+    embedding = HuggingFaceInferenceAPIEmbeddings(api_key="abcd123")
+    assert "abcd123" not in repr(embedding)