[#2901] Refactor DefaultReactiveFlushEntityEventListener in order to reuse most of the code of DefaultFlushEntityEventListener instead of rewriting it

# Conflicts:
#	hibernate-reactive-core/src/main/java/org/hibernate/reactive/event/impl/DefaultReactiveFlushEntityEventListener.java

Author: dreab8

gradle.properties

@@ -43,12 +43,12 @@ org.gradle.java.installations.auto-download=false
 #enableCentralSonatypeSnapshotsRep = true
 
 # Enable the maven local repository (for local development when needed) when present (value ignored)
-#enableMavenLocalRepo = true
+enableMavenLocalRepo = true
 
 ### Settings the following properties will override the version defined in gradle/libs.versions.toml
 
 # The default Hibernate ORM version (override using `-PhibernateOrmVersion=the.version.you.want`)
-#hibernateOrmVersion = 7.1.1.Final
+hibernateOrmVersion = 7.2.1-SNAPSHOT
 
 # Override default Hibernate ORM Gradle plugin version
 #hibernateOrmGradlePluginVersion = 7.1.1.Final