[remove import *][2/n] remove rest of import * in implementations (#690)

# What does this PR do?

- see https://github.com/meta-llama/llama-stack/pull/689
<img width="591" alt="image"
src="https://github.com/user-attachments/assets/76946a67-7373-43b5-8a03-0ad201aa543b"
/>

- leaving `tools/builtin.py` to avoid conflicts


## Test Plan

- see https://github.com/meta-llama/llama-stack/pull/689

## 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/inline/agents/meta_reference/rag/context_retriever.py

@@ -7,8 +7,6 @@
 from typing import List
 
 from jinja2 import Template
-from llama_models.llama3.api import *  # noqa: F403
-
 
 from llama_stack.apis.agents import (
     DefaultMemoryQueryGeneratorConfig,
@@ -16,7 +14,7 @@ from llama_stack.apis.agents import (
     MemoryQueryGenerator,
     MemoryQueryGeneratorConfig,
 )
-from llama_stack.apis.inference import *  # noqa: F403
+from llama_stack.apis.inference import Message, UserMessage
 from llama_stack.providers.utils.inference.prompt_adapter import (
     interleaved_content_as_str,
 )