ci: Add test cases for CoCo image pulling without forked containerd

Additional tests are necessary to verify new feature that pulling image without forked containerd in CoCo.

Fixes kata-containers#5763

Depends:
kata-containers/kata-containers#7688
kata-containers/kata-containers#7676

Signed-off-by: ChengyuZhu6 <[email protected]>

Author: ChengyuZhu6