[leyden] Please review 8360555: Archive all unnamed modules in CDS full module graph

[ioi.lam at oracle.com]

Leyden developers, please review

https://github.com/openjdk/jdk/pull/26082

This PR is a preliminary step for JDK-8350550: Preload classes from AOT 
cache during VM bootstrap, which will make sure all cached classes have 
already been loaded before any Java code is executed. This should make 
it easier to implement AOT compilation of Java methods.

Thanks!

- Ioi