[master] Set JDK 21 as a compiler release switch #1979
Merged
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It leads into following minimal changes to pass a build:
new Locale(...)
intoLocale.of(...)
addFirst(...), addLast(...)
collision inorg.eclipse.persistence.internal.helper.linkedlist.ExposedNodeLinkedList
withjava.util.List
[this is incompatible change, but limited to "internal" classesjpa.test.metamodel.apectj
Maven module as AspectJ 1.9.20.1 is not JDK 21 readywaiting for a new relase (see Java 21 eclipse-aspectj/aspectj#261)