libvirt: add auto-discovery support for device passthrough pools

[pupacha]

Description

Add a new flag in HostDevicePoolSchema to let lisa auto discover the device pool.

Related Issue

None

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring
• Documentation update

Checklist

• Description is filled in above
• No credentials, secrets, or internal details are included
• Peer review requested (if not, add required peer reviewers after raising PR)
• Tests executed and results posted below

Test Validation

N/A

Test Results

N/A

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds an auto_discover flag to host device pool configuration so libvirt-backed device passthrough pools can be discovered automatically when explicit device identifiers aren’t provided.

Changes:

• Extend HostDevicePoolSchema with auto_discover: bool.
• Update passthrough pool configuration path to support an auto-discovery workflow.
• Implement libvirt-specific auto-discovery and pool creation from discovered candidates.

Reviewed changes

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

File	Description
lisa/sut_orchestrator/util/schema.py	Adds auto_discover flag to device pool schema.
lisa/sut_orchestrator/util/device_pool.py	Routes passthrough pool configuration to auto-discovery and introduces a base auto_discover_pool hook.
lisa/sut_orchestrator/libvirt/libvirt_device_pool.py	Implements auto-discovery for libvirt pools and creates pools from discovered candidates.

[github-actions]

✅ AI Test Selection — PASSED

1 test case(s) selected (view run)

Marketplace image: canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest

	Count
✅ Passed	1
❌ Failed	0
⏭️ Skipped	0
Total	1

Test case details

Test Case	Status	Time (s)	Message
smoke_test (lisa_0_0)	✅ PASSED	42.219

[LiliDeng]

@vyadavmsft @anirudhrb please review, thanks.

[vyadavmsft]

@pupacha changes looks fine but can you test this too. Just to make sure this works as intended and not break exisiting test. we can work offline to test.

[vyadavmsft]

lets test is first, if its working as intended.

[LiliDeng]

@pupacha please provide the test results.

[github-actions]

✅ AI Test Selection — PASSED

1 test case(s) selected (view run)

Marketplace image: canonical 0001-com-ubuntu-server-jammy 22_04-lts-gen2 latest

	Count
✅ Passed	1
❌ Failed	0
⏭️ Skipped	0
Total	1

Test case details

Test Case	Status	Time (s)	Message
smoke_test (lisa_0_0)	✅ PASSED	38.415