fix(clients): upgrade to maven central publishing #5055
                
     Merged
            
            
          
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🧭 What and Why
We used OSSRH to release our JVM clients, but the support has been dropped on the 30th of June: https://central.sonatype.org/pages/ossrh-eol/#central-support
Migrate to the new Maven Central Publishing.
I've generated a new token, it's stored in vault and the Java, Kotlin and Scala github secrets.