Should be able to choose which attempt of a run to view

Following on from #5629, now gh run view only shows the latest attempt. Which means you can either retry a failed run OR check its logs, but not both at the same time.

Proposed solution

A new option --attempt that defaults to latest, which allows the user to specify which run attempt they would like to view.

It benefits the CLI and its users by matching more closely the web UI, which lets users choose which attempt to view.