add 3.3 to together inference provider (#729)

# What does this PR do?

- add llama3.3 model for together
- fix fireworks distro_codegen

```
python llama_stack/scripts/distro_codegen.py
```

## Test Plan

<img width="1132" alt="image"
src="https://github.com/user-attachments/assets/bf94b933-9200-4e73-878e-d1a95d450a88"
/>

**Tests**
```
pytest -v -s -k "together" --inference-model="meta-llama/Llama-3.3-70B-Instruct" ./llama_stack/providers/tests/inference/test_text_inference.py
```
<img width="1139" alt="image"
src="https://github.com/user-attachments/assets/407dc98b-8de3-4841-8cb1-75e4b5128544"
/>


## 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/providers/remote/inference/together/together.py

@@ -79,6 +79,10 @@ MODEL_ALIASES = [
         "meta-llama/Llama-3.2-90B-Vision-Instruct-Turbo",
         CoreModelId.llama3_2_90b_vision_instruct.value,
     ),
+    build_model_alias(
+        "meta-llama/Llama-3.3-70B-Instruct-Turbo",
+        CoreModelId.llama3_3_70b_instruct.value,
+    ),
     build_model_alias(
         "meta-llama/Meta-Llama-Guard-3-8B",
         CoreModelId.llama_guard_3_8b.value,