docs: Add news article for volume encryption modifications
docs: Add news article for volume encryption modifications

Include both the domain and storage modifications in a "Removed
features" section as well as describing the improvement to allow
using a raw input volume to create the luks encrypted volume.

Signed-off-by: John Ferlan <87558058f6f829e5ec976c8ef960720af4ff9c7d@redhat.com>
ACKed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

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