Latest version of HazyResearch/manifest doesn't support accessing "client" directly (#10389)

**Description:** 
The latest version of HazyResearch/manifest doesn't support accessing
the "client" directly. The latest version supports connection pools and
a client has to be requested from the client pool.
**Issue:**
No matching issue was found
**Dependencies:** 
The manifest.ipynb file in docs/extras/integrations/llms need to be
updated
**Twitter handle:** 
@hrk_cbe

libs/langchain/langchain/llms/manifest.py

@@ -34,7 +34,10 @@ class ManifestWrapper(LLM):
     @property
     def _identifying_params(self) -> Mapping[str, Any]:
         kwargs = self.llm_kwargs or {}
-        return {**self.client.client.get_model_params(), **kwargs}
+        return {
+            **self.client.client_pool.get_current_client().get_model_params(),
+            **kwargs,
+        }
 
     @property
     def _llm_type(self) -> str: