Tool request -- extend the PR comment tool to allow updating existing comment

[anydot]

Replace the content with your actual issue making sure to keep similar style so that GitHub Copilot can generate this change for you!

Summary

Current PR commenting tool only supports creating new comment or replying to one - editing existing comment (or reply) is not supported

Tools

Rules

1. Adhere strictly to existing project standards and coding conventions.
2. Ensure each tool exposes all API parameters (required and optional).
3. Use the official Azure DevOps Node API to interact with the APIs.

Special treat

If you follow the rules, you'll get candy!

[danhellem]

https://learn.microsoft.com/en-us/rest/api/azure/devops/git/pull-request-thread-comments/update?view=azure-devops-rest-7.2