[WebAgenticChat] Improve UI of the tool messages

Igor Drozdovrequested to merge
id-render-tool-msg-for-agentic-chat into master

What does this MR do and why?

Related issue: [WebAgenticChat] Display tool messages and othe... (#550808 - closed)

This MR renders the messages with a role tool correctly, so they are displayed as following in the Duo Agentic Chat:

Screenshot_2025-06-30_at_00.01.08

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