Fix "no private access for invokespecial"

Resolves IllegalAccessException by using MethodHandles.privateLookupIn()
instead of MethodHandles.lookup().in() to obtain proper private access
privileges before invoking interface default methods reflectively.

Introduced by GH-4149

Signed-off-by: Yanming Zhou <[email protected]>

Author: quaff

spring-ai-spring-boot-testcontainers/src/main/java/org/springframework/ai/testcontainers/service/connection/mongo/MongoDbAtlasLocalContainerConnectionDetailsFactory.java

@@ -83,8 +83,8 @@ public ConnectionString getConnectionString() {
 		public SslBundle getSslBundle() {
 			if (GET_SSL_BUNDLE_METHOD != null) { // Boot 3.5.x+
 				try {
-					return (SslBundle) MethodHandles.lookup()
-						.in(GET_SSL_BUNDLE_METHOD.getDeclaringClass())
+					MethodHandles.Lookup origin = MethodHandles.lookup().in(getClass());
+					return (SslBundle) MethodHandles.privateLookupIn(GET_SSL_BUNDLE_METHOD.getDeclaringClass(), origin)
 						.unreflectSpecial(GET_SSL_BUNDLE_METHOD, GET_SSL_BUNDLE_METHOD.getDeclaringClass())
 						.bindTo(this)
 						.invokeWithArguments();