gh run ls: allow filtering by which event triggered it #7361
Description
Describe the feature or problem you’d like to solve
similar to #7351 and #7235, gh run ls is missing a flag to get at the event= filtering query parameter that is available from the GitHub REST API.
Proposed solution
won't have to reach for gh api or waste rate limit and time paginating through all runs to achieve this functionality
Additional context
Do we want there to be a client-side check or enum for valid events?