ci: don't fetch test code from Yi's repo

[henrywang]

This PR remove some un-used test code for greenboot-rs test. The greenboot-rs integration test code will be moved into greenboot-rs branch by PR #133 instead of fetch code from Yi's repo.

[yih-redhat]

The original plan is to add the test scripts in branch greenboot-rs, and then Sayan can make a rebase in his pr #100 to trigger the test.
After discussed with Sayan, he mentioned rebase could cause some problems now, so I put the test scripts in my repo, and plan to move them into greenboot-rs branch after Sayan merged his pr #100

[henrywang]

They are all about test code, and not related with greenboot code. So the rebase should work because the rebase is just to add one more tests folder. Or you can add test code into PR #100. That can avoid issue. So let's land this PR first.

[henrywang]

@say-paul Could you please review this PR? Thanks!

[say-paul]

I suggested against it earlier as the tests were more inline with the current green-boot, which would fail the new -rs branch. Since its now inline with the greenboot-rs, its safe to merge.

[say-paul]

greenboot-rs built process is itself broken, and needs some update, merging a tests on that branch wont give us any advantage. so we can keep the pr #133 open until #100 is merged.

But this PR makes sense and look good to me.