chore: add missing ToolConfig import in groq.py (#983)

# What does this PR do?

Imported `ToolConfig` from the `llama_stack.apis.inference` module to
resolve missing reference and ensure proper functionality within the
`groq.py` file.

Signed-off-by: Sébastien Han <seb@redhat.com>


## Test Plan

Without the change, pytest will run with the following error:

```
uv run pytest -v -s -k "ollama" llama_stack/providers/tests/
/Users/leseb/Documents/AI/llama-stack/.venv/lib/python3.13/site-packages/pytest_asyncio/plugin.py:207: PytestDeprecationWarning: The configuration option "asyncio_default_fixture_loop_scope" is unset.
The event loop scope for asynchronous fixtures will default to the fixture caching scope. Future versions of pytest-asyncio will default the loop scope for asynchronous fixtures to function scope. Set the default fixture loop scope explicitly in order to avoid unexpected behavior in the future. Valid fixture loop scopes are: "function", "class", "module", "package", "session"

  warnings.warn(PytestDeprecationWarning(_DEFAULT_FIXTURE_LOOP_SCOPE_UNSET))
============================================ test session starts =============================================
platform darwin -- Python 3.13.1, pytest-8.3.4, pluggy-1.5.0 -- /Users/leseb/Documents/AI/llama-stack/.venv/bin/python3
cachedir: .pytest_cache
metadata: {'Python': '3.13.1', 'Platform': 'macOS-15.3-arm64-arm-64bit-Mach-O', 'Packages': {'pytest': '8.3.4', 'pluggy': '1.5.0'}, 'Plugins': {'html': '4.1.1', 'metadata': '3.1.1', 'asyncio': '0.25.3', 'anyio': '4.8.0', 'nbval': '0.11.0'}}
rootdir: /Users/leseb/Documents/AI/llama-stack
configfile: pyproject.toml
plugins: html-4.1.1, metadata-3.1.1, asyncio-0.25.3, anyio-4.8.0, nbval-0.11.0
asyncio: mode=Mode.STRICT, asyncio_default_fixture_loop_scope=None
collected 379 items / 1 error / 349 deselected / 30 selected                                                 

=================================================== ERRORS ===================================================
__________________ ERROR collecting llama_stack/providers/tests/inference/groq/test_init.py __________________
llama_stack/providers/tests/inference/groq/test_init.py:11: in <module>
    from llama_stack.providers.remote.inference.groq.groq import GroqInferenceAdapter
llama_stack/providers/remote/inference/groq/groq.py:72: in <module>
    class GroqInferenceAdapter(Inference, ModelRegistryHelper, NeedsRequestProviderData):
llama_stack/providers/remote/inference/groq/groq.py:102: in GroqInferenceAdapter
    tool_config: Optional[ToolConfig] = None,
E   NameError: name 'ToolConfig' is not defined
========================================== short test summary info ===========================================
ERROR llama_stack/providers/tests/inference/groq/test_init.py - NameError: name 'ToolConfig' is not defined
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
=============================== 349 deselected, 22 warnings, 1 error in 0.28s ================================
```

With the change the test continues to run and fails with a different
error:

```
uv run pytest -v -s llama_stack/providers/tests/
/Users/leseb/Documents/AI/llama-stack/.venv/lib/python3.13/site-packages/pytest_asyncio/plugin.py:207: PytestDeprecationWarning: The configuration option "asyncio_default_fixture_loop_scope" is unset.
The event loop scope for asynchronous fixtures will default to the fixture caching scope. Future versions of pytest-asyncio will default the loop scope for asynchronous fixtures to function scope. Set the default fixture loop scope explicitly in order to avoid unexpected behavior in the future. Valid fixture loop scopes are: "function", "class", "module", "package", "session"

  warnings.warn(PytestDeprecationWarning(_DEFAULT_FIXTURE_LOOP_SCOPE_UNSET))
============================================ test session starts =============================================
platform darwin -- Python 3.13.1, pytest-8.3.4, pluggy-1.5.0 -- /Users/leseb/Documents/AI/llama-stack/.venv/bin/python3
cachedir: .pytest_cache
metadata: {'Python': '3.13.1', 'Platform': 'macOS-15.3-arm64-arm-64bit-Mach-O', 'Packages': {'pytest': '8.3.4', 'pluggy': '1.5.0'}, 'Plugins': {'html': '4.1.1', 'metadata': '3.1.1', 'asyncio': '0.25.3', 'anyio': '4.8.0', 'nbval': '0.11.0'}}
rootdir: /Users/leseb/Documents/AI/llama-stack
configfile: pyproject.toml
plugins: html-4.1.1, metadata-3.1.1, asyncio-0.25.3, anyio-4.8.0, nbval-0.11.0
asyncio: mode=Mode.STRICT, asyncio_default_fixture_loop_scope=None
collected 342 items / 1 error                                                                                

=================================================== ERRORS ===================================================
______________ ERROR collecting llama_stack/providers/tests/inference/test_vision_inference.py _______________
llama_stack/providers/tests/inference/test_vision_inference.py:29: in <module>
    class TestVisionModelInference:
llama_stack/providers/tests/inference/test_vision_inference.py:35: in TestVisionModelInference
    ImageContentItem(image=dict(data=PASTA_IMAGE)),
E   pydantic_core._pydantic_core.ValidationError: 1 validation error for ImageContentItem
E   image.data
E     Input should be a valid string, unable to parse raw data as a unicode string [type=string_unicode, input_value=b'\xff\xd8\xff\xe0\x00\x1...0\xe6\x9f5\xb5?\xff\xd9', input_type=bytes]
E       For further information visit https://errors.pydantic.dev/2.10/v/string_unicode
========================================== short test summary info ===========================================
ERROR llama_stack/providers/tests/inference/test_vision_inference.py - pydantic_core._pydantic_core.ValidationError: 1 validation error for ImageContentItem
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
======================================= 22 warnings, 1 error in 0.25s ========================================
```

Which is fixed in https://github.com/meta-llama/llama-stack/pull/1003.

## 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.

Signed-off-by: Sébastien Han <seb@redhat.com>

llama_stack/providers/remote/inference/groq/groq.py

@@ -26,6 +26,7 @@ from llama_stack.apis.inference import (
     Message,
     ResponseFormat,
     ToolChoice,
+    ToolConfig,
 )
 from llama_stack.distribution.request_headers import NeedsRequestProviderData
 from llama_stack.providers.remote.inference.groq.config import GroqConfig