Unique keyvault name for LLM notebooks (#2598)

* randomize keyvault name

* formatting

* shorten kv name

---------

Co-authored-by: Vanessa Arndorfer <vaarndor@microsoft.com>

sdk/python/endpoints/online/llm/langchain/1_langchain_basic_deploy.ipynb

@@ -208,11 +208,11 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import random\n",
+    "import datetime\n",
     "\n",
-    "rand = random.randint(0, 10000)\n",
+    "time = str(datetime.datetime.now().strftime(\"%m%d%H%M%f\"))\n",
     "\n",
-    "KEYVAULT_NAME = f\"aml-llm-demo-kv-{rand}\"\n",
+    "KEYVAULT_NAME = f\"llmdemokv{time}\"\n",
     "KV_OPENAI_KEY = \"OPENAI-API-KEY\"\n",
     "\n",
     "keyvault_mgmt_client = KeyVaultManagementClient(\n",
@@ -338,8 +338,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import datetime\n",
-    "\n",
     "from azure.ai.ml.entities import (\n",
     "    ManagedOnlineDeployment,\n",
     "    OnlineRequestSettings,\n",

sdk/python/endpoints/online/llm/semantic-kernel/1_semantic_http_server.ipynb

@@ -239,11 +239,11 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import random\n",
+    "import datetime\n",
     "\n",
-    "rand = random.randint(0, 10000)\n",
+    "time = str(datetime.datetime.now().strftime(\"%m%d%H%M%f\"))\n",
     "\n",
-    "KEYVAULT_NAME = f\"aml-llm-demo-kv-{rand}\"\n",
+    "KEYVAULT_NAME = f\"llmdemokv{time}\"\n",
     "KV_OPENAI_KEY = \"OPENAI-API-KEY\"\n",
     "\n",
     "keyvault_mgmt_client = KeyVaultManagementClient(\n",
@@ -369,8 +369,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import datetime\n",
-    "\n",
     "from azure.ai.ml.entities import (\n",
     "    ManagedOnlineDeployment,\n",
     "    OnlineRequestSettings,\n",