search: Remove focus from search query input when pressing Escape (CodeMirror)

Created by: fkling

Addresses #29937 for CodeMirror

https://user-images.githubusercontent.com/179026/177567345-c78ae39e-41ba-4a31-a95b-a4c095971a74.mp4

Test plan

Focus main query input, press escape. Focus should be removed.

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.