Change language and bytecode levels to Java 25 (#3009)

Release/Build tested in alpha.

Deployed in crash.

java_common.gradle

@@ -88,6 +88,7 @@ test {
 // A typical use case is to run tests from desktop that accesses Cloud resources.
 tasks.withType(Test).configureEach {
   maxHeapSize = "4096m"
+  jvmArgs "--sun-misc-unsafe-memory-access=allow", "--enable-native-access=ALL-UNNAMED"
   def gcp_integration_env_property = 'test.gcp_integration.env'
 
   if (project.hasProperty(gcp_integration_env_property)) {