Update host_array import

dask/distributed#8312 has changed the
`host_array` submodule where it belongs.

python/distributed-ucxx/distributed_ucxx/ucxx.py

@@ -21,17 +21,13 @@
 from distributed.comm.addressing import parse_host_port, unparse_host_port
 from distributed.comm.core import Comm, CommClosedError, Connector, Listener
 from distributed.comm.registry import Backend
-from distributed.comm.utils import (
-    ensure_concrete_host,
-    from_frames,
-    host_array,
-    to_frames,
-)
+from distributed.comm.utils import ensure_concrete_host, from_frames, to_frames
 from distributed.diagnostics.nvml import (
     CudaDeviceInfo,
     get_device_index_and_uuid,
     has_cuda_context,
 )
+from distributed.protocol.utils import host_array
 from distributed.utils import ensure_ip, get_ip, get_ipv6, log_errors, nbytes
 
 logger = logging.getLogger(__name__)