feat: Add support for the new ChatMessage data class in ChatPromptBuilder

[shadeMe]

Proposed Changes:

Since the newly-introduced ChatMessage dataclass in experimental defers in type signature, components in the core package that consume the above dataclass are no longer able to use the new version due to the type-checking constraints of the pipeline and breaking changes to the class.

This PR updates one such component to use the new version of the ChatMessage dataclass. Other components will be duly updated once tool support has been merged into the core package.

How did you test it?

Unit tests

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 12013770435

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.3%) to 82.323%

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Files with Coverage Reduction	New Missed Lines	%
components/tools/openapi/_schema_conversion.py	3	88.79%

Totals
Change from base Build 12010924988:	0.3%
Covered Lines:	2417
Relevant Lines:	2936

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💛 - Coveralls

[anakin87]

Looks good in general. I left two minor comments.

I see that "Sync docs with Readme" workflow is failing, but I don't know if it's related to the current PR.

[shadeMe]

I see that "Sync docs with Readme" workflow is failing, but I don't know if it's related to the current PR.

That's unrelated; has to do with the fact that this PR comes from a fork.