JDK-8306476 caused ArchiveHeapTestClass.java to reliably crash when running "java -Xshare:dump" for the following test case

https://github.com/openjdk/jdk/blob/20b1d19d26a039b963590ca6f806f78a4a94c25f/test/hotspot/jtreg/runtime/cds/appcds/cacheObject/ArchiveHeapTestClass.java#L160
mustFail(output, "Class pkg.ClassInPackage not allowed in archive heap");

However, the test case only checks for a non-zero exit code and the require error message. It missed the fact that the JVM has crashed. As a result, JDK-8306476 was discovered only intermittently when the test itself timed out.

It will be cumbersome to test for JVM crashing in every test case. Since most of CDS tests launch subprocesses using CDSTestUtils.executeAndLog, we can add the following check there:

if (output.getStdout().contains("https://bugreport.java.com/bugreport/crash.jsp")) {
    throw new RuntimeException("Hotspot crashed");
}