Support bootc installation for mrack plugin

[skycastlelily]

Pull Request Checklist

• implement the feature
• write the documentation
• extend the test coverage
• update the specification
• adjust plugin docstring
• modify the json schema
• mention the version
• include a release note

[skycastlelily]

hi @henrywang , it would be great if you could review this mr when you get some time to spare, as I get many clue from you boot-beaker-test code,thanks:)

[skycastlelily]

Hi, @henrywang @thrix @ukulekek this is finally ready for review, feel free to check on your side:)
You will end up with a warn result, but it seems will not prevent the following steps on the tmt plan to run.
But it's ugly and will pretty likely confuse the users, to resolve that we need to
add a check-system task to the job, and tmt doesn't support add task, so I opened a mr
And there is more stones: beaker doesn't support fetch-url, so I opened mr
It seems that beaker maintainer is not active, if it's not going to be merged, I may could find a workaround from mrack side, whose maintainer is pretty welcoming for patch:)

Please note, we only support fedora now, and if we agree on it's gonna to implement in this way,I'm gonna to open
more mrs to support rhel and cs and switch task:)

[skycastlelily]

FYI, the beaker mr is merged 🎉 thanks to the maintainer, and he also said we could get it land soon as a minor update :)

[skycastlelily]

mrack mr to support dry was merged and landed long time ago, so enable tests/provision/beaker test and extend the test for this mr , mrack mr to support fetch_url is also merged and landed,btw:)

[skycastlelily]

Please note,we should create a check-system task for tmt users, instead of using bootc-beaker-test's:)