Refactor: Anthropic NB (#4489)

Author: Sam-Deciga

notebooks/official/generative_ai/anthropic_claude_intro.ipynb

@@ -229,7 +229,7 @@
         "elif MODEL == \"claude-opus-4-5\":\n",
         "    available_regions = [\"us-east5\", \"europe-west1\", \"asia-southeast1\", \"global\"]\n",
         "elif MODEL == \"claude-haiku-4-5\":\n",
-        "    available_regions = [\"us-east5\", \"europe-west1\", \"asia-east1\", \"global\"]\n",
+        "    available_regions = [\"us-east5\", \"europe-west1\", \"global\"]\n",
         "elif MODEL == \"claude-sonnet-4-5\":\n",
         "    available_regions = [\"us-east5\", \"europe-west1\", \"asia-southeast1\", \"global\"]\n",
         "elif MODEL == \"claude-opus-4-1\":\n",
@@ -690,7 +690,7 @@
         "elif MODEL == \"claude-opus-4-5\":\n",
         "    available_regions = [\"us-east5\", \"europe-west1\", \"asia-southeast1\", \"global\"]\n",
         "elif MODEL == \"claude-haiku-4-5\":\n",
-        "    available_regions = [\"us-east5\", \"europe-west1\", \"asia-east1\", \"global\"]\n",
+        "    available_regions = [\"us-east5\", \"europe-west1\", \"global\"]\n",
         "elif MODEL == \"claude-sonnet-4-5\":\n",
         "    available_regions = [\"us-east5\", \"europe-west1\", \"asia-southeast1\", \"global\"]\n",
         "elif MODEL == \"claude-opus-4-1\":\n",