clean multinicipam test case and handle hanging interfaces

[sunya-ch]

This PR mainly makes changes for the problematic test case (multinic_ipam) to call controller unit function directly instead of calling the handle function on the deployed resource in the test environment.
The previous version may timely have an issue on CI due to long delays of resource deployment.

With the same commit, there are also the following fixes:

• add missing values in the clusterserviceversion to pass the bundle test
• modify CIDR handling function to include only available host-interface items (aka not add removed host-interface).

Signed-off-by: Sunyanan Choochotkaew [email protected]