Release libcryptsetup-rs 0.15.1

[mulkieran]

Milestone: https://github.com/stratis-storage/libcryptsetup-rs/milestone/7
Changelog PR:
Prior release: #804

• Upstream:
• Fedora:
  • rawhide:
    • verify stratisd scratch build succeeds in rawhide w/ new version:
  • f43:
  • f42: