ch: detect VMM version from git repository for Docker-based tests

[vyadavmsft]

Problem:

Cloud-hypervisor performance tests report VMM version as 'UNKNOWN' instead of actual version (e.g., '48.0.235'). Tests run cloud-hypervisor inside Docker containers which are build environments without pre-compiled binaries, making binary-based version detection unreliable.

Root Cause:

1. Tests execute cloud-hypervisor by compiling from source inside Docker build containers
2. Previous version detection attempted to query non-existent binaries in Docker images
3. Version detection ran during teardown when SSH session was closing, causing failures

Solution:

1. Primary: Extract version from git repository where tests clone cloud-hypervisor source
   • Uses 'git describe --tags' matching how tests report version metadata
   • Handles patterns: 'msft/v48.0.235', 'v48.0.235-7-g6fed5f8e7'

[Copilot]

Pull request overview

This PR fixes Cloud Hypervisor performance test metadata reporting by improving how the cloud-hypervisor VMM version is detected and made available to platform/environment information collection (especially for Docker-based tests that build from source).

Changes:

• Enhance get_vmm_version() to prefer a cached value, then fall back to local binary version output, then to git describe from the cloned repo.
• Cache the detected VMM version during CloudHypervisorTests tool installation for later use by platform information hooks.
• Update Cloud Hypervisor test case signatures to accept Environment (framework injection alignment).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
lisa/sut_orchestrator/platform_utils.py	Adds cached + git-repo-based VMM version detection logic.
lisa/microsoft/testsuites/cloud_hypervisor/ch_tests_tool.py	Caches detected VMM version post-install for later metadata collection.
lisa/microsoft/testsuites/cloud_hypervisor/ch_tests.py	Adds Environment parameter to CH test cases for framework injection consistency.

**Key Test Cases:**
verify_cloud_hypervisor_performance_metrics_tests|verify_cloud_hypervisor_integration_tests

**Impacted LISA Features:**
Virtualization

**Tested Azure Marketplace Images:**
- canonical 0001-com-ubuntu-server-jammy 22_04-lts latest
- microsoftcblmariner azure-linux-3 azure-linux-3 latest

[LiliDeng]

@copilot please rebase the latest main into this branch.

[Copilot]

@LiliDeng I've opened a new pull request, #4258, to work on those changes. Once the pull request is ready, I'll request review from you.

[vyadavmsft]

please rebase the latest main into this branch.

i did the rebase.

[vyadavmsft]

@LiliDeng can you check this , something not right with pr checks

[LiliDeng]

For azure platform, it is expected to see unknown, the cached version doesn't work on azure platform.

[vyadavmsft]

ok , is there anything specific you are asking to change ? im not clear with your comment.

[LiliDeng]

You need to find a way to distinguish between platforms or perform the check only on platforms that do not have a VMM version.

[vyadavmsft]

Line 64: Now uses cached "UNKNOWN" values (removed the != "UNKNOWN" check)
Line 129: Now caches "UNKNOWN" results at the end.

this should remove overhead, First test checks once and caches "UNKNOWN" and next tests use cache.