Is your feature request related to a problem? Please describe.
Today, we provide the user with a screenshot of the last successful check in the Synthetics step view:

Describe the solution you'd like
When there is not a previously-successful journey, this area of the UI is devoid of any information:

Describe alternatives you've considered
We should provide an empty state for this, notifying them that no previous checks have succeeded and we therefore have no screenshot available for them to view.

Additional context
N/A