* Re-enable most of the tests previously marked as irrelevant
* Print ocamltest logs when CI is failing
* Use format to print fatal errors

Directly printing strings for fatal errors messes up the redirections
that are done by the expect_tests (which redirects format output
functions), hence the fatal_errorf function must pass through the
err_formatter.

* Re-enable most of the tests previously marked as irrelevant
* Print ocamltest logs when CI is failing
* Use format to print fatal errors

Directly printing strings for fatal errors messes up the redirections
that are done by the expect_tests (which redirects format output
functions), hence the fatal_errorf function must pass through the
err_formatter.

* Re-enable most of the tests previously marked as irrelevant
* Print ocamltest logs when CI is failing
* Use format to print fatal errors

Directly printing strings for fatal errors messes up the redirections
that are done by the expect_tests (which redirects format output
functions), hence the fatal_errorf function must pass through the
err_formatter.