Consider adding an easy way to switch to the production version of the profiler when looking at a deploy preview

Florian mentioned this to me in person: If we share a link to a deploy preview (which #3121 will make easier), it might be nice to have a notification displayed in the UI to say: "You are looking at a deploy preview. Click here to switch to the production instance"

┆Issue is synchronized with this [Jira Task](https://mozilla-hub.atlassian.net/browse/FP-900)

The issue does not name a file, test, or entry point. Start by locating the UI entry point and how deploy previews are identified and linked to production; done means a deploy-preview visitor sees a notification with a working link to the production profiler.

Written by the indexing model from the issue text.