Draft: Resolve "Add dedicated storage backend for NVM"

• Add PMDK dependency to CMake
• Add PMDK dependencies to docker images
• Update dl_dep.sh and compile_dep.sh scripts with PMDK library
• Enable runtime configuration of data backends
• Design common interface for data backends
• Implement PMDK backend
  • Add abstraction to manage PMDK pools
  • Implement pmdk::ChunkStorage class
• Enable integration tests to run also for PMDK backends

Closes #124