tools/rv: Fix cleanup after failed trace setup

Currently if ikm_setup_trace_instance() fails, the tool returns without
any cleanup, if rv was called with both -t and -r, this means the
reactor is not going to be cleared.

Jump to the cleanup label to restore the reactor if necessary.

Fixes: 6d60f89691 ("tools/rv: Add in-kernel monitor interface")
Reviewed-by: Nam Cao <namcao@linutronix.de>
Link: https://lore.kernel.org/r/20260514152055.229162-5-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>

tools/verification/rv/src/in_kernel.c

@@ -810,7 +810,7 @@ int ikm_run_monitor(char *monitor_name, int argc, char **argv)
 	if (config_trace) {
 		inst = ikm_setup_trace_instance(nested_name);
 		if (!inst)
-			return -1;
+			goto out_free_instance;
 	}
 
 	retval = ikm_enable(full_name);