Override java version 25-ea to be 24 for kotlin compiler (#9274)

Author: sarahchen6

dd-java-agent/agent-debugger/src/test/java/com/datadog/debugger/agent/CapturingTestBase.java

@@ -436,11 +436,30 @@ public static Class<?> compileAndLoad(
       String compilerOutputDir = "/tmp/" + CapturedSnapshotTest.class.getSimpleName() + "-kotlin";
       args.setDestination(compilerOutputDir);
       args.setClasspath(System.getProperty("java.class.path"));
-      ExitCode exitCode =
-          compiler.execImpl(
-              new PrintingMessageCollector(System.out, MessageRenderer.WITHOUT_PATHS, true),
-              Services.EMPTY,
-              args);
+      // We are currently testing JDK 25-ea, which is not yet generally available. This is causing
+      // Kotlin compilation issues for "25-ea" and "25". Temporarily override java.version "25-ea"
+      // to be the latest generally available JDK version "24".
+      // TODO: Revert this change once JDK 25 is generally available and tested.
+      String originalJavaVersion = System.getProperty("java.version");
+      boolean overrideEAJavaVersion =
+          originalJavaVersion != null && originalJavaVersion.contains("-ea");
+      ExitCode exitCode;
+      try {
+        if (overrideEAJavaVersion) {
+          System.setProperty("java.version", "24");
+        }
+        exitCode =
+            compiler.execImpl(
+                new PrintingMessageCollector(System.out, MessageRenderer.WITHOUT_PATHS, true),
+                Services.EMPTY,
+                args);
+      } finally {
+        // Restore the original java.version if it was overridden (25-ea)
+        if (overrideEAJavaVersion) {
+          System.setProperty("java.version", originalJavaVersion);
+        }
+      }
+
       if (exitCode.getCode() != 0) {
         throw new RuntimeException("Kotlin compilation failed");
       }