HHH-20334 Upgrade to Log4j 2.25.4

Technically we only:

1. Use it for testing
2. Have an API dependency in hibernate-testing, which provides some tools to work with log4j

So the various CVEs are not really relevant:

* https://logging.apache.org/security.html#CVE-2026-34478
* https://logging.apache.org/security.html#CVE-2026-34479
* https://logging.apache.org/security.html#CVE-2026-34481

Still, let’s avoid the noise related to automated tools reporting the problem.

Author: yrodiere

settings.gradle

@@ -181,7 +181,7 @@ dependencyResolutionManagement {
             def bytemanVersion = version "byteman", "4.0.20"
             def jbossJtaVersion = version "jbossJta", "7.0.0.Final"
             def jbossTxSpiVersion = version "jbossTxSpi", "8.0.0.Final"
-            def log4jVersion = version "log4j", "2.17.1"
+            def log4jVersion = version "log4j", "2.25.4"
             def mockitoVersion = version "mockito", "5.2.0"
             //Compatible with JDK20
             def shrinkwrapVersion = version "shrinkwrap", "1.2.6"