Do not create anon thread

[cstamas]

Affected version

I think all since shutdown thread is used

Bug description

See

maven-surefire/maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/AbstractSurefireMojo.java

Line 947 in 76e806a

Thread shutdownThread = new Thread(platform::setShutdownState);

This creates anon thread (and also hopefully removes it), but in large builds, profiling shows a TON on anon threads being created and not started. At least provide sensible name for this thread that can lead back to surefire.