ceph-volume: use 'no workqueue' options with dmcrypt

ceph-volume: use 'no workqueue' options with dmcrypt

CloudFlare engineers made some testing and realized that using
workqueues with encryption on flash devices has a bad effect.

See [1] for details.

With this patch it will make ceph-volume call crypsetup with
`--perf-no_read_workqueue` and `--perf-no_write_workqueue` options
when the device is not a rotational.

[1] https://blog.cloudflare.com/speeding-up-linux-disk-encryption/

Signed-off-by: Guillaume Abrioux <gabrioux@ibm.com>
Co-Authored-by: Stefan Kooman <stefan@kooman.org>
Signed-off-by: Guillaume Abrioux <gabrioux@ibm.com>