I152fe10ff5a3131950b789d3fd4efa15c554ff09 attempted to ensure LUKS
volumes were formatted using the LUKS v1 header format by using a type
of `luks`. However from cryptsetup 2.1.0 (incorrectly referenced as
2.0.6 in the previous change) this type can actually refer to the newer
LUKS v2 header format in environments where cryptsetup has not complied
with the `--with-default-luks-format=LUKS1` build time configuration
option [1].
This change now explicitly uses the luks1 type when formatting a device
to ensure the correct LUKS v1 header format is used.
[1] https://gitlab.com/cryptsetup/cryptsetup/blob/master/docs/v2.1.0-ReleaseNotes
Closes-Bug: #1834851
Change-Id: I0010e9014c06a3a812d24d9d5ef598425ac5d5d4
97b085f448