feat(providers): sambanova updated to use LiteLLM openai-compat (#1596)

# What does this PR do?

switch sambanova inference adaptor to LiteLLM usage to simplify
integration and solve issues with current adaptor when streaming and
tool calling, models and templates updated

## Test Plan
pytest -s -v tests/integration/inference/test_text_inference.py
--stack-config=sambanova
--text-model=sambanova/Meta-Llama-3.3-70B-Instruct

pytest -s -v tests/integration/inference/test_vision_inference.py
--stack-config=sambanova
--vision-model=sambanova/Llama-3.2-11B-Vision-Instruct

llama_stack/templates/dependencies.json

@@ -619,10 +619,11 @@
     "fastapi",
     "fire",
     "httpx",
+    "litellm",
     "matplotlib",
+    "mcp",
     "nltk",
     "numpy",
-    "openai",
     "opentelemetry-exporter-otlp-proto-http",
     "opentelemetry-sdk",
     "pandas",
@@ -637,7 +638,9 @@
     "sentencepiece",
     "tqdm",
     "transformers",
-    "uvicorn"
+    "uvicorn",
+    "sentence-transformers --no-deps",
+    "torch torchvision --index-url https://download.pytorch.org/whl/cpu"
   ],
   "tgi": [
     "aiohttp",