feat:[response_format] Bedrock client structured output

[priyansh4320]

Why are these changes needed?

This pull removes the bedrock unsupported warning on structured output / response_format param and adds support for response format referanced via beedrock documentation.
https://aws.amazon.com/blogs/machine-learning/structured-data-response-with-amazon-bedrock-prompt-engineering-and-tool-use/

Related issue number

#2225

Checks

• I've included any doc changes needed for https://docs.ag2.ai/. See https://docs.ag2.ai/latest/docs/contributor-guide/documentation/ to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[joggrbot]

📝 Documentation Analysis

All docs are up to date! 🎉

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✅ Latest commit analyzed: e4dc1b7 | Powered by Joggr

[KojoOwusu]

So Im testing out the new changes here but I seem to be getting an error with my async tool calls not being awaited

Call ID: tooluse_o4Tw0b5bS9mZJTlg5dcs3w
Input arguments: {'query': 'FACULTY SCIENCE LTD technology consultancy Old Street London'}
Output:
<coroutine object web_search at 0x10a823e20>
_Group_Tool_Executor (to chat_manager):

***** Response from calling tool (tooluse_o4Tw0b5bS9mZJTlg5dcs3w) *****
<coroutine object web_search at 0x10a823e20>```

[priyansh4320]

So Im testing out the new changes here but I seem to be getting an error with my async tool calls not being awaited

Call ID: tooluse_o4Tw0b5bS9mZJTlg5dcs3w
Input arguments: {'query': 'FACULTY SCIENCE LTD technology consultancy Old Street London'}
Output:
<coroutine object web_search at 0x10a823e20>
_Group_Tool_Executor (to chat_manager):

***** Response from calling tool (tooluse_o4Tw0b5bS9mZJTlg5dcs3w) *****
<coroutine object web_search at 0x10a823e20>```

solved in this PR:
#2221

[KojoOwusu]

So the changes in 2221 solved the async. Agent runs but when it tries to call structured_output tool i get error:

***** Response from calling tool (tooluse_WcVAwKeaQgyEyO1KAHaTSg) *****
Error: Function __structured_output not found.`

[randombet]

@priyansh4320 Please add integration tests with real API calls.

[DanCorvesor]

@priyansh4320 sorry to be impatient but wanted to check in on this

[priyansh4320]

@priyansh4320 sorry to be impatient but wanted to check in on this

@DanCorvesor integration tests should be done by today. and then we will merge bedrock PRs. :) thank you checking.

[DanCorvesor]

Did you see @KojoOwusu 's above comment tho, seems we've found an issue

[marklysze]

Thanks @priyansh4320, nice work!

[codecov]

Codecov Report

❌ Patch coverage is 62.68657% with 25 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
autogen/oai/bedrock.py	62.68%	15 Missing and 10 partials ⚠️

Files with missing lines	Coverage Δ
autogen/oai/bedrock.py	62.30% <62.68%> (+15.61%)	⬆️

... and 13 files with indirect coverage changes

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