Test result counts are incorrect

https://codereview.qt-project.org/c/qt/qtbase/+/253709 introduced incorrect behavior for counting tests. A blacklisted test will be counted twice now.

There are also issues with expect-fail tests (both blacklisted and not), where an expected pass will count as a failure, but with Continue will go on testing, possibly introducing more expected passes, each one increasing the failure count, and perhaps finally resulting in a failed QVERIFY, furthermore increasing the count. The real count should increase by 1, since these are all failures in the same test. (we count tests, not verifications).