Show obsolete snapshots in the report

[insane-developer]

Is your feature request related to a problem? Please describe.
Jest fails (=exits with nonzero status) when a snapshot become obsolete (i.e. when a snapshot assertion has been deleted but a corresponding snapshot has not).
Reports made by the current version of a reporter make this situation extremely unclear: all tests in the report are green, but the test run failed.

Describe the solution you'd like

Add an additional failure record about obsolete snapshots to the corresponding group in the report

Describe alternatives you've considered

Reporter jest-html-reporter have an option to show such obsolete snapshots