Restore copy link button to PR overview header for improved discoverability#7806

Copilot wants to merge 3 commits intomainmicrosoft/vscode-pull-request-github:mainfrom

copilot/fix-7ebb2cf5-3a9d-4af2-b320-c2c882383204microsoft/vscode-pull-request-github:copilot/fix-7ebb2cf5-3a9d-4af2-b320-c2c882383204Copy head branch name to clipboard