execute: Get rid of custom logging macros

We already have LOG_CONTEXT_PUSH_EXEC() which with two additions
does exactly the same as the custom logging macros, so let's get rid
of the custom logging macros and use LOG_CONTEXT_PUSH_EXEC() instead.

src/core/executor.c

@@ -240,6 +240,8 @@ static int run(int argc, char *argv[]) {
         if (r < 0)
                 return log_error_errno(r, "Failed to deserialize: %m");
 
+        LOG_CONTEXT_PUSH_EXEC(&context, &params);
+
         arg_serialization = safe_fclose(arg_serialization);
         fdset = fdset_free(fdset);
 
@@ -253,11 +255,11 @@ static int run(int argc, char *argv[]) {
                 const char *status = ASSERT_PTR(
                                 exit_status_to_string(exit_status, EXIT_STATUS_LIBC | EXIT_STATUS_SYSTEMD));
 
-                log_exec_struct_errno(&context, &params, LOG_ERR, r,
-                                      LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED_STR),
-                                      LOG_EXEC_MESSAGE(&params, "Failed at step %s spawning %s: %m",
-                                                       status, command.path),
-                                      LOG_ITEM("EXECUTABLE=%s", command.path));
+                log_struct_errno(LOG_ERR, r,
+                                 LOG_MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED_STR),
+                                 LOG_EXEC_MESSAGE(&params, "Failed at step %s spawning %s: %m",
+                                                  status, command.path),
+                                 LOG_ITEM("EXECUTABLE=%s", command.path));
         } else
                 /* r == 0: 'skip' is chosen in the confirm spawn prompt
                  * r > 0:  expected/ignored failure, do not log at error level */