feat: add tool calling argument validation

[akihikokuroda]

Misc PR

Type of PR

• Bug Fix
• New Feature
• Documentation
• Other

Description

• Link to Issue: fix: improve handling of generated inputs for tool calls #251

Testing

• Tests added to the respective file if code was changed
• New code has 100% coverage if code as added
• Ensure existing tests and github automation passes (a maintainer will kick off the github automation when the rest of the PR is populated)

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[psschwei]

@akihikokuroda looks like there's a test failure (and needs a rebase on main)

[psschwei]

otherwise, I think this LGTM

[psschwei]

Saw that #380 was opened yesterday, so should confirm with @HendrikStrobelt that the approach here is compatible with that PR

[akihikokuroda]

@psschwei Minor merges are necessary because same files are changed but they look compatible.