Move the storage test suite from test/storage/ to test/cluster/storage/ to consolidate related cluster-based tests.This removes the standalone test/storage/suite.yaml as the tests will use the cluster's test configuration. Initially these tests were in cluster, but to use unshare at first iteration they were moved outside. Now they are using another way to handle volumes without unshare, they should be in cluster Closes scylladb/scylladb#28634
Extension of the cluster tests, where all tests require externally mounted volumes to be used by scylla cluster nodes. The volumes are passed with --workdir.
The volumes can be of any size. A help generator space_limited_servers is provided
to easily create a cluster of any given number of nodes, where each node operates in
a separate volume.