Summary: Create a new generic component: a button that looks like a link. This is a common pattern for things that are not actually links to anything, but have onclick behavior and should *look* like links.
Test Plan: View storybook examples, verify correct rendering and hover/focus behavior.
Reviewers: bengotow, sashank
Reviewed By: sashank
Differential Revision: https://dagster.phacility.com/D5194