DeepSpeed

bfa48315 - Fix: Use /mnt/aio/pytest subdirectory for basetemp

Fix: Use /mnt/aio/pytest subdirectory for basetemp pytest --basetemp expects to create the directory, but /mnt/aio is a mount point that already exists. Use /mnt/aio/pytest subdirectory instead. Signed-off-by: Masahiro Tanaka <mtanaka@anyscale.com>