script for running client sdk tests (#895)

# What does this PR do?
Create a script for running all client-sdk tests on Async Library
client, with the option to generate report


## Test Plan

```
python llama_stack/scripts/run_client_sdk_tests.py --templates together fireworks --report
```



## 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.

tests/client-sdk/report.py

@@ -175,7 +175,7 @@ class Report:
                 "|:-----|:-----|:-----|:-----|:-----|",
             ]
             provider = [p for p in providers if p.api == str(api_group.name)]
-            provider_str = provider[0].provider_type if provider else ""
+            provider_str = ",".join(provider) if provider else ""
             for api, capa_map in API_MAPS[api_group].items():
                 for capa, tests in capa_map.items():
                     for test_name in tests: