receive: don't fail inheriting (-x) properties on wrong dataset type

Receiving datasets while blanket inheriting properties like zfs
receive -x mountpoint can generally be desirable, e.g. to avoid
unexpected mounts on backup hosts.

Currently this will fail to receive zvols due to the mountpoint
property being applicable to filesystems only. This limitation
currently requires operators to special-case their minds and tools
for zvols.

This change gets rid of this limitation for inherit (-x) by
Spiting up the dataset type handling: Warnings for inheriting (-x),
errors for overriding (-o).

Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: InsanePrawn <insane.prawny@gmail.com>
Closes #11416
Closes #11840
Closes #11864