jdk23 build

[Tilman Hausherr]

I've set up a jdk23 build. There are a few mockito test fails, that may 
be related to the newer jdk version. I'll wait a bit until there's a new 
version of mockito (and bytebuddy).

java.lang.IllegalArgumentException: Java 23 (67) is not supported by the 
current version of Byte Buddy which officially supports Java 22 (66) - update 
Byte Buddy or set net.bytebuddy.experimental as a VM property