Sometimes users want to provide parameters specific to a model provider.
This is an escape hatch.

## Summary
- ensure `name_override` is always used in `function_schema`
- test name override when docstring info is disabled

## Testing
- `make format`
- `make lint`
- `make mypy`
- `make tests`

Resolves openai#860
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https://chatgpt.com/codex/tasks/task_i_684f1cf885b08321b4dd3f4294e24ca2

I replaced the `timedelta` parameters for MCP timeouts with `float`
values, addressing issue openai#845 .

Given that the MCP official repository has incorporated these changes in
[this PR](modelcontextprotocol/python-sdk#941),
updating the MCP version in openai-agents and specifying the timeouts as
floats should be enough.

Add support for the new openai prompts feature.