Fixes#16912
By default, ScyllaDB stores the maintenance socket in the workdir. Test.py by default uses the location for the ScyllaDB workdir as testlog/{mode}/scylla-#. The Usual location for cloning the repo is the user's home folder. In some cases, it can lead the socket path being too long and the test will start to fail. The simple way is to move the maintenance socket to /tmp folder to eliminate such a possibility.
Closesscylladb/scylladb#17941