petri: backend agnostic additional disk configuration

[tjones60]

Makes the generic Petri configuration aware of additional disks and provides generic interfaces for adding controllers and disks. All Petri disks are now managed generically so that each backend just needs to know how to attach a generalized disk.

[Copilot]

Pull request overview

This PR makes the Petri VMM test framework backend-agnostic for additional storage configuration. It introduces generic interfaces for adding storage controllers and disks, with full implementation for Hyper-V and stubs for OpenVMM. The changes align storage management across both backends and move VTL2 settings handling into the runtime configuration.

Key changes:

• Introduces PetriStorageController, PetriVmRuntimeConfig, StorageType, and Vtl types for generic storage management
• Refactors Vtl2StorageControllerBuilder API to require controller type at construction time
• Renames PetriDiskType to PetriDisk for consistency
• Updates OpenHCL configuration to support dynamic VTL2 settings modification via ModifyFn

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
petri/src/vm/mod.rs	Core API additions for storage controllers and disks; runtime configuration structure; refactored disk and VTL enums
petri/src/vm/vtl2_settings.rs	Simplified Vtl2StorageControllerBuilder API to take controller type at construction
petri/src/vm/openvmm/mod.rs	Stubbed out storage controller support; moved VTL2 settings to runtime config
petri/src/vm/openvmm/start.rs	Updated to return runtime config; apply VTL2 settings modifications
petri/src/vm/openvmm/runtime.rs	Added trait implementation for VTL2 settings and disk operations (stubbed)
petri/src/vm/openvmm/modify.rs	Updated VTL2 settings access patterns
petri/src/vm/openvmm/construct.rs	Validation for unsupported additional storage controllers
petri/src/vm/hyperv/mod.rs	Full implementation of storage controller and disk addition; VTL2 settings in runtime config
petri/src/vm/hyperv/powershell.rs	Added conversion from StorageType to PowerShell ControllerType
vmm_tests/vmm_tests/tests/tests/x86_64/storage.rs	Updated tests to use new API for storage controllers and VTL2 settings
vmm_tests/vmm_tests/tests/tests/x86_64/openhcl_linux_direct.rs	Updated builder API calls
vmm_tests/vmm_tests/tests/tests/multiarch/openhcl_servicing.rs	Updated builder API calls

[github-actions]

At least one Petri test failed.

[github-actions]

At least one Petri test failed.

[github-actions]

At least one Petri test failed.

[github-actions]

At least one Petri test failed.

[github-actions]

At least one Petri test failed.