Test for #74336

• Mac @bowdenk7
• Linux @jrieken
• Windows @stevencl

Complexity: 3

Overview
#74336 finalized the DocumentLink.tooltip property. This lets extensions customize the hover text of document links

Testing
Use the ContentProviderSample and set a tooltip on the document links. Confirm that the tooltip is rendered as expected in the UI

Look over the api. Do you understand the property and how it should be used?