Revise the initialization flow of interface as per specs

As per Java Language and JVM Specs, the initialization is changed
to initialize Java interface's super interfaces if applicable
with default method.

Fixes: #24153

Author: lzhou2025

runtime/vm/ClassInitialization.cpp

@@ -721,35 +721,34 @@ classInitStateMachine(J9VMThread *currentThread, J9Class *clazz, J9ClassInitStat
 					}
 					superITable = (J9ITable*)superclazz->iTable;
 				}
-				/* Do not initialize the superinterfaces of interfaces */
-				if (!J9_ARE_ANY_BITS_SET(clazz->romClass->modifiers, J9AccInterface)) {
-					/* Initialize super-interfaces with non-static, non-abstract methods */
-					Trc_VM_classInitStateMachine_initSuperInterfacesWithNonStaticNonAbstractMethods(currentThread, clazz);
-					/* Don't traverse all iTables - indirect super-interfaces are initialized with the superclass */
-					firstITable = (J9ITable*)clazz->iTable;
-					iTable = firstITable;
-					while (iTable != superITable) {
-						J9Class *interfaceClazz = iTable->interfaceClass;
-						if (J9_ARE_ANY_BITS_SET(interfaceClazz->romClass->extraModifiers, J9AccClassHasNonStaticNonAbstractMethods)) {
-							PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, initializationLock);
-							classInitStateMachine(currentThread, interfaceClazz, J9_CLASS_INIT_INITIALIZED);
-							initializationLock = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
-							clazz = VM_VMHelpers::currentClass(clazz);
-							if (VM_VMHelpers::exceptionPending(currentThread)) {
-								goto initFailed;
-							}
-							/* Ensure that we are still traversing a valid iTable chain */
-							if (firstITable != (J9ITable*)clazz->iTable) {
-								iTable = (J9ITable*)clazz->iTable;
-								if (NULL != superclazz) {
-									superclazz = VM_VMHelpers::getSuperclass(clazz);
-									superITable = (J9ITable*)superclazz->iTable;
-								}
-								continue;
+
+				/* Initialize super-interfaces with non-static, non-abstract methods */
+				Trc_VM_classInitStateMachine_initSuperInterfacesWithNonStaticNonAbstractMethods(currentThread, clazz);
+				/* Don't traverse all iTables - indirect super-interfaces are initialized with the superclass */
+				firstITable = (J9ITable*)clazz->iTable;
+				iTable = firstITable;
+				while (iTable != superITable) {
+					J9Class *interfaceClazz = iTable->interfaceClass;
+
+					if (J9_ARE_ANY_BITS_SET(interfaceClazz->romClass->extraModifiers, J9AccClassHasNonStaticNonAbstractMethods)) {
+						PUSH_OBJECT_IN_SPECIAL_FRAME(currentThread, initializationLock);
+						classInitStateMachine(currentThread, interfaceClazz, J9_CLASS_INIT_INITIALIZED);
+						initializationLock = POP_OBJECT_IN_SPECIAL_FRAME(currentThread);
+						clazz = VM_VMHelpers::currentClass(clazz);
+						if (VM_VMHelpers::exceptionPending(currentThread)) {
+							goto initFailed;
+						}
+						/* Ensure that we are still traversing a valid iTable chain */
+						if (firstITable != (J9ITable*)clazz->iTable) {
+							iTable = (J9ITable*)clazz->iTable;
+							if (NULL != superclazz) {
+								superclazz = VM_VMHelpers::getSuperclass(clazz);
+								superITable = (J9ITable*)superclazz->iTable;
 							}
+							continue;
 						}
-						iTable = iTable->next;
 					}
+					iTable = iTable->next;
 				}
 
 #if defined(J9VM_OPT_VALHALLA_FLATTENABLE_VALUE_TYPES)