docs: Update IBM WatsonxLLM and ChatWatsonx documentation (#29752)

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Update presented model in `WatsonxLLM` and `ChatWatsonx` documentation.

- [x] **Lint and test**: Run `make format`, `make lint` and `make test`
from the root of the package(s) you've modified. See contribution
guidelines for more: https://python.langchain.com/docs/contributing/

docs/docs/integrations/chat/ibm_watsonx.ipynb

@@ -210,7 +210,7 @@
    "id": "96ed13d4",
    "metadata": {},
    "source": [
-    "Instead of `model_id`, you can also pass the `deployment_id` of the previously tuned model. The entire model tuning workflow is described in [Working with TuneExperiment and PromptTuner](https://ibm.github.io/watsonx-ai-python-sdk/pt_working_with_class_and_prompt_tuner.html)."
+    "Instead of `model_id`, you can also pass the `deployment_id` of the previously [deployed model with reference to a Prompt Template](https://cloud.ibm.com/apidocs/watsonx-ai#deployments-text-chat)."
    ]
   },
   {
@@ -228,6 +228,31 @@
     ")"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "3d29767c",
+   "metadata": {},
+   "source": [
+    "For certain requirements, there is an option to pass the IBM's [`APIClient`](https://ibm.github.io/watsonx-ai-python-sdk/base.html#apiclient) object into the `ChatWatsonx` class."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0ae9531e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from ibm_watsonx_ai import APIClient\n",
+    "\n",
+    "api_client = APIClient(...)\n",
+    "\n",
+    "chat = ChatWatsonx(\n",
+    "    model_id=\"ibm/granite-34b-code-instruct\",\n",
+    "    watsonx_client=api_client,\n",
+    ")"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "f571001d",
@@ -448,9 +473,7 @@
    "source": [
     "## Tool calling\n",
     "\n",
-    "### ChatWatsonx.bind_tools()\n",
-    "\n",
-    "Please note that `ChatWatsonx.bind_tools` is on beta state, so we recommend using `mistralai/mistral-large` model."
+    "### ChatWatsonx.bind_tools()"
    ]
   },
   {
@@ -563,7 +586,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "langchain_ibm",
    "language": "python",
    "name": "python3"
   },

docs/docs/integrations/llms/ibm_watsonx.ipynb

@@ -195,7 +195,7 @@
    "id": "96ed13d4",
    "metadata": {},
    "source": [
-    "Instead of `model_id`, you can also pass the `deployment_id` of the previously tuned model. The entire model tuning workflow is described [here](https://ibm.github.io/watsonx-ai-python-sdk/pt_working_with_class_and_prompt_tuner.html)."
+    "Instead of `model_id`, you can also pass the `deployment_id` of the previously tuned model. The entire model tuning workflow is described in [Working with TuneExperiment and PromptTuner](https://ibm.github.io/watsonx-ai-python-sdk/pt_tune_experiment_run.html)."
    ]
   },
   {
@@ -420,7 +420,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "langchain_ibm",
    "language": "python",
    "name": "python3"
   },