smbd/ioctl: match WS2016 ReFS get compression behaviour

smbd/ioctl: match WS2016 ReFS get compression behaviour

ReFS doesn't support compression, but responds to get-compression FSCTLs
with a successful COMPRESSION_FORMAT_NONE response. set-compression
results in NT_STATUS_NOT_SUPPORTED.

This commit modifies Samba to match the ReFS behaviour, when run atop
a VFS that doesn't expose compression support.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=12144

Reported-by: Nick Barrett
Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>