feat: add support for tool_choice to responses api (#4106)

# What does this PR do?
Adds support for enforcing tool usage via responses api. See
https://platform.openai.com/docs/api-reference/responses/create#responses_create-tool_choice
for details from official documentation.
Note: at present this PR only supports `file_search` and `web_search` as
options to enforce builtin tool usage

<!-- If resolving an issue, uncomment and update the line below -->
Closes #3548 

## Test Plan
<!-- Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.* -->
`./scripts/unit-tests.sh
tests/unit/providers/agents/meta_reference/test_response_tool_context.py
`

---------

Signed-off-by: Jaideep Rao <jrao@redhat.com>
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Jaideep Rao 2025-12-16 00:52:06 +05:30 committed by GitHub
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commit 56f946f3f5
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18 changed files with 49989 additions and 3 deletions

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docs/static/llama-stack-spec.html vendored Normal file

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