Set max JVM test version for log4j1 (#9437)

Author: sarahchen6

dd-java-agent/instrumentation/log4j1/build.gradle

@@ -1,3 +1,8 @@
+ext {
+  // Log4j 1.x reached EOL in 2015 and is not compatible with Java 25+: https://endoflife.date/log4j
+  maxJavaVersionForTests = JavaVersion.VERSION_24
+}
+
 muzzle {
   pass {
     group = 'log4j'

dd-java-agent/instrumentation/log4j1/src/test/groovy/MdcTest.groovy

@@ -1,15 +1,10 @@
-import datadog.environment.JavaVirtualMachine
 import datadog.trace.agent.test.AgentTestRunner
 import org.apache.log4j.Category
 import org.apache.log4j.MDC
 import org.apache.log4j.Priority
 import org.apache.log4j.spi.LoggingEvent
-import spock.lang.IgnoreIf
 
 class MdcTest extends AgentTestRunner {
-  @IgnoreIf(reason = "TODO: Fix for Java 25.", value = {
-    JavaVirtualMachine.isJavaVersionAtLeast(25)
-  })
   def "should preserve mdc when logging injection is #injectionEnabled"() {
     setup:
     injectSysConfig("logs.injection", injectionEnabled)