ci: add Image Mode test automation without Packit

[mcattamoredhat]

This is an approach to add Image Mode RHEL-10 ci tests without using Packit, and making rpm packages within the testing farm spawned VM instead.

The reason to proceed without Packit is to circumvent the difficulty of handling environment secrets, that implies encrypting needed secrets in every fork that opens a pull request against upstream repository.

[miabbott]

@yih-redhat can you review this please?

[djach7]

Reviewed manually and with github copilot, no syntactical or semantic issues found. I have one very minor nit just for consistency.

[yih-redhat]

@mcattamoredhat Hi, I am not familiar with the tmt structure in this pr (it's different than what I did before), just wondering if the workflow can find the tmt plan/tests and trigger test script properly?

[mcattamoredhat]

@mcattamoredhat Hi, I am not familiar with the tmt structure in this pr (it's different than what I did before), just wondering if the workflow can find the tmt plan/tests and trigger test script properly?

@yih-redhat This is because .fmf folder location is different than greenboot ci code or downstream ci code.

The workflow is able to discover tmt plans/tests thanks to tmt_path input https://github.com/fdo-rs/fido-device-onboard-rs/pull/770/files#diff-ce39f44ea7732d0fbb4f2cecba1ead3eab68c156e4114244c167b1ca9d842be4R56 where the location of .fmf folder is specified. This is enough for the workflow to be able to find tests/plans.

[djach7]

Pulled this down and built successfully on my local machine. Thanks for fixing that minor nit too. It looks like there's a couple of clippy/spelling issues but otherwise LGTM. (I see the dev container and triage failures too but I think those are unrelated, someone please correct me if I'm wrong though.)

[mmartinv]

Failing tests have nothing to do with the proposed changes and overall it LGTM

[mmartinv]

LGTM