fix nvidia inference provider (#781)

# What does this PR do?

- fixes to nvidia inference provider to account for strategy update
- update nvidia templates

## Test Plan

```
llama stack run ./llama_stack/templates/nvidia/run.yaml --port 5000

LLAMA_STACK_BASE_URL="http://localhost:5000" pytest -v tests/client-sdk/inference/test_inference.py --html=report.html --self-contained-html
```
<img width="1288" alt="image"
src="https://github.com/user-attachments/assets/d20f9aea-525e-47de-a5be-586e022e0d55"
/>

**NOTE**
- vision inference broken
- tool calling broken
- /completion broken

cc @mattf @cdgamarose-nv  for improving NVIDIA inference adapter

## Sources

Please link relevant resources if necessary.


## Before submitting

- [ ] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [ ] Ran pre-commit to handle lint / formatting issues.
- [ ] Read the [contributor
guideline](https://github.com/meta-llama/llama-stack/blob/main/CONTRIBUTING.md),
      Pull Request section?
- [ ] Updated relevant documentation.
- [ ] Wrote necessary unit or integration tests.

llama_stack/templates/nvidia/nvidia.py

@@ -6,8 +6,11 @@
 
 from pathlib import Path
 
+from llama_models.sku_list import all_registered_models
+
 from llama_stack.distribution.datatypes import ModelInput, Provider
 from llama_stack.providers.remote.inference.nvidia import NVIDIAConfig
+from llama_stack.providers.remote.inference.nvidia.nvidia import _MODEL_ALIASES
 
 from llama_stack.templates.template import DistributionTemplate, RunConfigSettings
 
@@ -36,10 +39,17 @@ def get_distribution_template() -> DistributionTemplate:
         config=NVIDIAConfig.sample_run_config(),
     )
 
-    inference_model = ModelInput(
-        model_id="${env.INFERENCE_MODEL}",
-        provider_id="nvidia",
-    )
+    core_model_to_hf_repo = {
+        m.descriptor(): m.huggingface_repo for m in all_registered_models()
+    }
+    default_models = [
+        ModelInput(
+            model_id=core_model_to_hf_repo[m.llama_model],
+            provider_model_id=m.provider_model_id,
+            provider_id="nvidia",
+        )
+        for m in _MODEL_ALIASES
+    ]
 
     return DistributionTemplate(
         name="nvidia",
@@ -48,13 +58,13 @@ def get_distribution_template() -> DistributionTemplate:
         docker_image=None,
         template_path=Path(__file__).parent / "doc_template.md",
         providers=providers,
-        default_models=[inference_model],
+        default_models=default_models,
         run_configs={
             "run.yaml": RunConfigSettings(
                 provider_overrides={
                     "inference": [inference_provider],
                 },
-                default_models=[inference_model],
+                default_models=default_models,
             ),
         },
         run_config_env_vars={