treewide: drop "RUN_" from "RUN_WITH_UMASK"

RUN_WITH_UMASK was initially conceived for spawning externals progs with the
umask set. But nowadays we use it various syscalls and stuff that doesn't "run"
anything, so the "RUN_" prefix has outlived its usefulness.

src/userdb/userdbd-manager.c

@@ -277,7 +277,7 @@ int manager_startup(Manager *m) {
 
                 (void) sockaddr_un_unlink(&sockaddr.un);
 
-                RUN_WITH_UMASK(0000)
+                WITH_UMASK(0000)
                         if (bind(m->listen_fd, &sockaddr.sa, SOCKADDR_UN_LEN(sockaddr.un)) < 0)
                                 return log_error_errno(errno, "Failed to bind socket: %m");