add kill test

[YamasouA]

part of #361
I implement kill test case in runtime-tools to youki.

[YJDoc2]

@YamasouA please sign your commits. The instructions can be found at https://github.com/youki-dev/youki/pull/2996/checks?check_run_id=33094881373

[YamasouA]

@YJDoc2
Thank you for your review!
I pass DCO.

[YJDoc2]

You can use normal test instead of ConditionalTest here, that will not require a conditional function.

[YJDoc2]

Hey @YamasouA , thanks for the PR. I have taken a basic look, and want to request a change -
The go tests usually put all test cases in a single function, but here we try to separate each test case as a different test, so it is easier to understand and maintain. see the code in #2976 , how it has created one test function for readonly=true and another for readonly=false.

Can I request you to change this code to split each test condition into its own testcase? So it will be one function for testing kill without id, one for kill non-existing container and so on.