vmm_tests: Update every test to use Ubuntu 24.04

[smalis-msft]

22.04 is really old now, let's see if everything works with our already existing 24.04

[Copilot]

Pull Request Overview

This PR updates all VMM tests to use Ubuntu 24.04 instead of Ubuntu 22.04. The changes remove references to the older Ubuntu 22.04 server image and replace them with Ubuntu 24.04 across the entire test suite.

Key Changes:

• Replace all ubuntu_2204_server_x64 references with ubuntu_2404_server_x64 in test configurations
• Remove Ubuntu 22.04 artifact definitions from the codebase
• Update flowey pipeline configurations to use the newer Ubuntu version

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vmm_tests/vmm_tests/tests/tests/x86_64/tpm.rs	Updated TPM tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/x86_64/storage.rs	Updated storage tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/x86_64/openhcl_uefi.rs	Updated OpenHCL UEFI tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/x86_64.rs	Updated x86_64 tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/multiarch/vmgs.rs	Updated VMGS tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/multiarch/vmbus_relay.rs	Updated vmbus relay tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/multiarch/openhcl_servicing.rs	Updated servicing tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/multiarch/ic.rs	Updated integration component tests to use Ubuntu 24.04
vmm_tests/vmm_tests/tests/tests/multiarch.rs	Updated multiarch tests to use Ubuntu 24.04
vmm_tests/vmm_test_macros/src/lib.rs	Removed Ubuntu 22.04 artifact definition and documentation
vmm_tests/vmm_test_images/src/lib.rs	Removed Ubuntu 22.04 from known test artifacts
vmm_tests/petri_artifacts_vmm_test/src/lib.rs	Removed Ubuntu 22.04 artifact implementation
vmm_tests/petri_artifact_resolver_openvmm_known_paths/src/lib.rs	Removed Ubuntu 22.04 path resolution
flowey/flowey_lib_hvlite/src/_jobs/local_build_and_run_nextest_vmm_tests.rs	Updated artifact selection logic
flowey/flowey_hvlite/src/pipelines/checkin_gates.rs	Updated checkin gate artifacts to use Ubuntu 24.04

[mattkur]

We've had cases where older kernel versions found bugs in openvmm and openhcl. I'd be reticent to lose this coverage, but I agree that we can trim our per-PR CI time (and developer experience) by doing this. Thoughts on a nightly CI run with additional guest coverage?

[smalis-msft]

I'd be open to that. The main thing I'm working towards here is fixing hvsocket and tdx support, both require kernel patches that are not present in our test images today. If I can get this in cleanly there will be a follow up updating even farther.

[github-actions]

At least one Petri test failed.

[github-actions]

At least one Petri test failed.

[benhillis]

We've had cases where older kernel versions found bugs in openvmm and openhcl. I'd be reticent to lose this coverage, but I agree that we can trim our per-PR CI time (and developer experience) by doing this. Thoughts on a nightly CI run with additional guest coverage?

I think this is a good callout, My team is tracking some CI improvements (different host OSs etc) and using different guest OS's for some kind of nightly / non-PR test sounds like a good idea.

[benhillis]

This looks good, I've followed up with Sunil about capturing a broader guest os matrix in nightly runs.