Skip test_out(qr//) tests

These do not work with recent versions of Test::Builder::Tester. A bug report was filed on this ("test_err(qr//) does not work with 0.98_05"). An explanation for the bug has been offered, but the bug has not been resolved yet:

    The problem is stringification in return:

        sub _account_for_subtest {
            my( $self, $check ) = @_;

            # Since we ship with Test::Builder, calling a private method is safe...ish.
            return $t->_indent . $check;
        }

    If the $check is a regular expression, it coerces it into string which obviously will not match.
v0.21_01

        Skip failing tests with Test::Builder::Test 1.23_002 where
        `test_out(qr//)` does not work because it tries to stringify `qr//`.