Start using waitid(2)

Index: src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
--- src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c.orig
+++ src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
@@ -259,7 +259,7 @@ Java_java_lang_ProcessHandleImpl_waitForProcessExit0(J
             return status;
         }
      } else {
-#if defined(__OpenBSD__)
+#if defined(__OpenBSD__) && OpenBSD < 202304
         return os_waitForProcessExitNoReap(pid);
 #else
         /*
