Polish "Fix spring-orm tests with eclipselink and Java 18+"

We can't upgrade to Eclipselink 4 as it would change the baseline that
this generation uses. However, there is a recent release in the current
line that adds compatibility with recent JDKs.

See gh-31078

Author: snicoll

framework-platform/framework-platform.gradle

@@ -116,7 +116,7 @@ dependencies {
 		api("org.crac:crac:1.4.0")
 		api("org.dom4j:dom4j:2.1.4")
 		api("org.eclipse.jetty:jetty-reactive-httpclient:4.0.0")
-		api("org.eclipse.persistence:org.eclipse.persistence.jpa:4.0.2")
+		api("org.eclipse.persistence:org.eclipse.persistence.jpa:3.0.4-RC1")
 		api("org.eclipse:yasson:2.0.4")
 		api("org.ehcache:ehcache:3.10.8")
 		api("org.ehcache:jcache:1.0.1")