Improvement[Embeddings] Add dimension support to ZhipuAIEmbeddings (#25274)

- In the in ` embedding-3 ` and later models of Zhipu AI, it is
supported to specify the dimensions parameter of Embedding. Ref:
https://bigmodel.cn/dev/api#text_embedding-3 .
- Add test case for `embedding-3` model by assigning dimensions.

libs/community/tests/integration_tests/embeddings/test_zhipuai.py

@@ -18,3 +18,14 @@ def test_zhipuai_embedding_query() -> None:
     embedding = ZhipuAIEmbeddings()  # type: ignore[call-arg]
     res = embedding.embed_query(document)
     assert len(res) == 1024  # type: ignore[arg-type]
+
+
+def test_zhipuai_embedding_dimensions() -> None:
+    """Test ZhipuAI Text Embedding for query by assigning dimensions"""
+    document = "This is a test query."
+    embedding = ZhipuAIEmbeddings(
+        model="embedding-3",
+        dimensions=2048,
+    )  # type: ignore[call-arg]
+    res = embedding.embed_query(document)
+    assert len(res) == 2048  # type: ignore[arg-type]