Tracker: 重构 Convert_v1_VirtualMachineInstance_To_api_Domain 函数

`Convert_v1_VirtualMachineInstance_To_api_Domain` is a very long function, containing complex logic that spans multiple SIGs (e.g., networking, storage, compute). The objective is to refactor this function by progressively breaking it down into smaller, well-defined, and independently testable components. Each new component should encapsulate logic belonging to a specific domain, allowing for clearer ownership by the relevant SIG.