Exposing just a single Persistance.Reference abstraction

[JaroslavTulach]

Set of changes I'd like to make to @radeusgd PR:

• Fixes to Persistance #10101
• Only the Reference abstraction
• Differentiated by Reference.of(obj, deferWrite)
• Two new ReferenceAsXyzTest showing two (times two) "reverted" chains being written
• Encapsulating Reference serde in PerReferencePeristance

[JaroslavTulach]

Javadoc for this API can be generated by

find lib/java/persistance/src/main/java/ | grep java$ | xargs ~/bin/graalvm-21/bin/javadoc -d target/javadoc/ -cp $HOME/.m2/repository/org/slf4j/slf4j-api/2.0.7/slf4j-api-2.0.7.jar:$HOME/.m2/repository/org/netbeans/api/org-openide-util-lookup/RELEASE150/org-openide-util-lookup-RELEASE150.jar --snippet-path lib/java/persistance/src/test/java/

any slf4j-api.jar and org-openide-util-lookup.jar will do.

[radeusgd]

I've built the Types PR #8652 on top of these changes and with some slight fixes to make it work, it seems that we are able to build the distribution (with and without static analysis enabled), as well as run the tests. So I think we can merge your PR into mine and then we can merge that PR.