Edit pull requests without fetching unsupported V1 projects
When you use gh pr edit to edit a pull request on a GitHub host that does not support V1 projects, gh CLI no longer tries to fetch those unsupported project records first. The edit can proceed without that unnecessary request. This handles the host's existing capability difference; it does not add V1 projects to the host. It's like changing an order at a branch that has no old service counter: the clerk handles the order directly instead of sending you to look for a counter that is not there.