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.

docs/source/distributions/self_hosted_distro/fireworks.md

@@ -42,6 +42,7 @@ The following models are available by default:
 - `meta-llama/Llama-3.2-3B-Instruct (fireworks/llama-v3p2-3b-instruct)`
 - `meta-llama/Llama-3.2-11B-Vision-Instruct (fireworks/llama-v3p2-11b-vision-instruct)`
 - `meta-llama/Llama-3.2-90B-Vision-Instruct (fireworks/llama-v3p2-90b-vision-instruct)`
+- `meta-llama/Llama-3.3-70B-Instruct (fireworks/llama-v3p3-70b-instruct)`
 - `meta-llama/Llama-Guard-3-8B (fireworks/llama-guard-3-8b)`
 - `meta-llama/Llama-Guard-3-11B-Vision (fireworks/llama-guard-3-11b-vision)`
 

docs/source/distributions/self_hosted_distro/together.md

@@ -41,6 +41,7 @@ The following models are available by default:
 - `meta-llama/Llama-3.2-3B-Instruct`
 - `meta-llama/Llama-3.2-11B-Vision-Instruct`
 - `meta-llama/Llama-3.2-90B-Vision-Instruct`
+- `meta-llama/Llama-3.3-70B-Instruct`
 - `meta-llama/Llama-Guard-3-8B`
 - `meta-llama/Llama-Guard-3-11B-Vision`