Adds unit tests and parity tests for the V2 shim

[shreyanshjain7174]

Summary

Adds unit tests covering the V2 shim controllers, HCS layer, service layer, and
parity tests between the legacy and V2 LCOW document builders. Also includes
Copilot code review infrastructure for automated V2 shim PR reviews.

This issue tracks the test PRs for the V2 shim.

Pending Review

• controller/vm: add comprehensive unit tests for VM Controller #2738
• Add Copilot code review for v2 shim PRs #2635
• hcs: add function variables for compute API calls and unit tests #2644 (on hold till v2 changes stabilise)
• service: add unit tests for LCOW v2 shim service layer #2649

Merged

• vmutils: add unit tests for allProcessEntries & LookupVMMEM #2628
• parity: add LCOW HCS document parity tests between legacy and v2 builders #2629
• controller/network: add unit tests for network controller #2647
• parity: add LCOW document permutation tests #2631