Standardize SparkLLM (#25239)

- **Description:** Standardize SparkLLM, include:
  - docs, the issue #24803 
  - to support stream
  - update api url
  - model init arg names, the issue #20085

libs/community/tests/integration_tests/llms/test_sparkllm.py

@@ -18,3 +18,28 @@ def test_generate() -> None:
     output = llm.generate(["Say foo:"])
     assert isinstance(output, LLMResult)
     assert isinstance(output.generations, list)
+
+
+def test_spark_llm_with_param_alias() -> None:
+    """Test SparkLLM with parameters alias."""
+    llm = SparkLLM(  # type: ignore[call-arg]
+        app_id="your-app-id",
+        api_key="your-api-key",
+        api_secret="your-api-secret",
+        model="Spark4.0 Ultra",
+        api_url="your-api-url",
+        timeout=20,
+    )
+    assert llm.spark_app_id == "your-app-id"
+    assert llm.spark_api_key == "your-api-key"
+    assert llm.spark_api_secret == "your-api-secret"
+    assert llm.spark_llm_domain == "Spark4.0 Ultra"
+    assert llm.spark_api_url == "your-api-url"
+    assert llm.request_timeout == 20
+
+
+def test_spark_llm_with_stream() -> None:
+    """Test SparkLLM with stream."""
+    llm = SparkLLM()  # type: ignore[call-arg]
+    for chunk in llm.stream("你好呀"):
+        assert isinstance(chunk, str)