Convert table in Admin / Applications and Admin / Deploy keys table to Pajamas CSS

Problem

The tables in these two sections do not conform to the standard Pajamas visual styling. The text in the heading wraps unnecessarily and the buttons do not appear to be the updated buttons.

Applications	Deploy keys

Solution

• update tables to conform to Pajamas component.
• Deploy keys buttons: Edit and Destroy should be changed to icon buttons
• Actions should be moved to ellipsis tertiary dropdown button

Availability & Testing

We have some deploy key related end-to-end tests that could be affected by this. Please run the package-and-qa job to ensure that the tests are fine. Thanks.