fix: bump libcryptsetup-rs and devicemapper

Bump libcryptsetup-rs to 0.16.1 and devicemapper to 0.34.7.
Update CryptParamsReencrypt to wrap luks2 field in Some() per new API.

Signed-off-by: Klara Necasova <knecasov@redhat.com>
Assisted-by: Claude (claude-opus-4-6)

Author: knecasov