ci: do not show test detail immediately (#4454)

TESTOPTS=-v shows running test and the result.
If something weird happen, it show error immediately.

As rake task executes many tests, so it may be better to
delay showing test details later.

NOTE: --progress-style=fault-only helps you to focus on
failure, but it is inconvenient when test case has stalled.

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>
Co-authored-by: Kentaro Hayashi <hayashi@clear-code.com>

.github/workflows/test.yml

@@ -29,4 +29,4 @@ jobs:
       - name: Install dependencies
         run: bundle install
       - name: Run tests
-        run: bundle exec rake test TESTOPTS=-v
+        run: bundle exec rake test TESTOPTS="-v --no-show-detail-immediately"