Is your feature request related to a problem? Please describe (👍 if you like this request)

This epic is for getting the v2 data engine to the experimental level to support the feature parity of the v1 data engine and live upgrade. This will require the underlining SPDK modules support, SPDK gRPC server, Instance Manager, and Longhorn Manager enhancement, also some refactoring efforts from 1.5.0 will be considered.

Describe the solution you'd like

The related sub-issues will be created and added to this epic via Zenhub.

• Volume Live Upgrade - Data plane (1.7)
• Online replica rebuilding (1.7)
• TRIM (1.7)
• Delta replica rebuilding via snapshot checksum (1.8)
• Snapshot checksum (*1.8)
• Volume Live Migration (1.8)
• Backing image (1.8)
• Volume Live Upgrade - Control Plane (1.11)
• Disaster Recovery Volume (1.9)
• Zero-copy/Fast Clone (1.10)
• Volume Expansion (1.10)
• Volume Encryption (1.8)
• Delta replica rebuilding via delta snapshot (1.10)
• Volume granual setting parity for V2 to match V1 data engine (1.10)

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

cc @longhorn/dev-data-plane