Fix github-discussion-query to use GraphQL API instead of non-existent gh discussion command#11371

pelikhan merged 5 commits intocopilot/update-smoke-agentic-workflowsgithub/gh-aw:copilot/update-smoke-agentic-workflowsfrom

copilot/debug-discussion-comment-failuregithub/gh-aw:copilot/debug-discussion-comment-failureCopy head branch name to clipboard