feat: Add open benchmark template codegen (#1579)

## What does this PR do?

As title, add codegen for open-benchmark template

## test 

checked the new generated run.yaml file and it's identical before and
after the change

Also add small improvement to together template so that missing
TOGETHER_API_KEY won't crash the server which is the consistent user
experience as other remote providers

distributions/dependencies.json

@@ -453,6 +453,40 @@
     "transformers",
     "uvicorn"
   ],
+  "open-benchmark": [
+    "aiosqlite",
+    "autoevals",
+    "blobfile",
+    "chardet",
+    "chromadb-client",
+    "datasets",
+    "fastapi",
+    "fire",
+    "httpx",
+    "litellm",
+    "matplotlib",
+    "mcp",
+    "nltk",
+    "numpy",
+    "openai",
+    "opentelemetry-exporter-otlp-proto-http",
+    "opentelemetry-sdk",
+    "pandas",
+    "pillow",
+    "psycopg2-binary",
+    "pymongo",
+    "pypdf",
+    "redis",
+    "requests",
+    "scikit-learn",
+    "scipy",
+    "sentencepiece",
+    "sqlite-vec",
+    "together",
+    "tqdm",
+    "transformers",
+    "uvicorn"
+  ],
   "remote-vllm": [
     "aiosqlite",
     "autoevals",