tests: remove gemini 2.0 exp model tests, move llm tests to large suite (#2484)

removed 2 notebooks that are outdated.

Author: GarrettWu

notebooks/generative_ai/bq_dataframes_llm_claude3_museum_art.ipynb

@@ -1283,7 +1283,8 @@
       "toc_visible": true
     },
     "kernelspec": {
-      "display_name": "Python 3",
+      "display_name": "venv (3.10.14)",
+      "language": "python",
       "name": "python3"
     },
     "language_info": {
@@ -1296,7 +1297,7 @@
       "name": "python",
       "nbconvert_exporter": "python",
       "pygments_lexer": "ipython3",
-      "version": "3.11.1"
+      "version": "3.10.14"
     }
   },
   "nbformat": 4,