tests/functional: Convert the Avocado s390x tuxrun test

Move the test to a new file so that it can be run via
qemu-system-s390x in the functional framework.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20241011131937.377223-6-thuth@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index efc2a2c..055dae8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1690,7 +1690,7 @@
 F: hw/s390x/
 F: include/hw/s390x/
 F: configs/devices/s390x-softmmu/default.mak
-F: tests/functional/test_s390x_ccw_virtio.py
+F: tests/functional/test_s390x_*
 T: git https://github.com/borntraeger/qemu.git s390-next
 L: qemu-s390x@nongnu.org