Summarize failed tests in all workspaces.

[amanusk]

Which component is your feature related to?

Forge

Feature Request

Currently, there is a summary per workspace of total tests and failed tests.

There is also a summary of all failed tests at the end.

Would be useful to also have a summary of all tests, and all fails, across all workspaces, when running snforge test -w

[piotmag769]

cc @cptartur (for post Christmas break)
should be easy to do