docs: update integration notebooks handling of env variables (#26330)

Using gritql

```
grit apply --language python '
`os.environ[$key] = getpass.getpass("$msg")` as $M where {
    $M <: ! within if_statement(),
    $M => `if $key not in os.environ: $M`
}' .
```

docs/docs/integrations/chat/anthropic.ipynb

@@ -59,6 +59,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"ANTHROPIC_API_KEY\" not in os.environ:\n",
     "    os.environ[\"ANTHROPIC_API_KEY\"] = getpass.getpass(\"Enter your Anthropic API key: \")"
    ]
   },

docs/docs/integrations/chat/azure_chat_openai.ipynb

@@ -58,7 +58,10 @@
     "import getpass\n",
     "import os\n",
     "\n",
-    "os.environ[\"AZURE_OPENAI_API_KEY\"] = getpass.getpass(\"Enter your AzureOpenAI API key: \")\n",
+    "if \"AZURE_OPENAI_API_KEY\" not in os.environ:\n",
+    "    os.environ[\"AZURE_OPENAI_API_KEY\"] = getpass.getpass(\n",
+    "        \"Enter your AzureOpenAI API key: \"\n",
+    "    )\n",
     "os.environ[\"AZURE_OPENAI_ENDPOINT\"] = \"https://YOUR-ENDPOINT.openai.azure.com/\""
    ]
   },

docs/docs/integrations/chat/cerebras.ipynb

@@ -76,6 +76,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"CEREBRAS_API_KEY\" not in os.environ:\n",
     "    os.environ[\"CEREBRAS_API_KEY\"] = getpass.getpass(\"Enter your Cerebras API key: \")"
    ]
   },

docs/docs/integrations/chat/databricks.ipynb

@@ -90,7 +90,10 @@
     "import os\n",
     "\n",
     "os.environ[\"DATABRICKS_HOST\"] = \"https://your-workspace.cloud.databricks.com\"\n",
-    "os.environ[\"DATABRICKS_TOKEN\"] = getpass.getpass(\"Enter your Databricks access token: \")"
+    "if \"DATABRICKS_TOKEN\" not in os.environ:\n",
+    "    os.environ[\"DATABRICKS_TOKEN\"] = getpass.getpass(\n",
+    "        \"Enter your Databricks access token: \"\n",
+    "    )"
    ]
   },
   {

docs/docs/integrations/chat/fireworks.ipynb

@@ -52,6 +52,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"FIREWORKS_API_KEY\" not in os.environ:\n",
     "    os.environ[\"FIREWORKS_API_KEY\"] = getpass.getpass(\"Enter your Fireworks API key: \")"
    ]
   },

docs/docs/integrations/chat/friendli.ipynb

@@ -44,6 +44,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"FRIENDLI_TOKEN\" not in os.environ:\n",
     "    os.environ[\"FRIENDLI_TOKEN\"] = getpass.getpass(\"Friendi Personal Access Token: \")"
    ]
   },

docs/docs/integrations/chat/google_generative_ai.ipynb

@@ -60,6 +60,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"GOOGLE_API_KEY\" not in os.environ:\n",
     "    os.environ[\"GOOGLE_API_KEY\"] = getpass.getpass(\"Enter your Google AI API key: \")"
    ]
   },

docs/docs/integrations/chat/groq.ipynb

@@ -50,6 +50,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"GROQ_API_KEY\" not in os.environ:\n",
     "    os.environ[\"GROQ_API_KEY\"] = getpass.getpass(\"Enter your Groq API key: \")"
    ]
   },

docs/docs/integrations/chat/mistralai.ipynb

@@ -52,6 +52,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"MISTRAL_API_KEY\" not in os.environ:\n",
     "    os.environ[\"MISTRAL_API_KEY\"] = getpass.getpass(\"Enter your Mistral API key: \")"
    ]
   },

docs/docs/integrations/chat/yi.ipynb

@@ -41,6 +41,7 @@
     "import getpass\n",
     "import os\n",
     "\n",
+    "if \"YI_API_KEY\" not in os.environ:\n",
     "    os.environ[\"YI_API_KEY\"] = getpass.getpass(\"Enter your Yi API key: \")"
    ]
   },