Add ore commands to create/delete AWS networking resources

[arithx]

Originally mentioned in https://github.com/coreos/mantle/pull/930#issuecomment-437138933

ore commands should be created to create & delete the AWS networking resources. At the same time the code that creates AWS resources if a certain piece does not exist should be pulled out of kola's code path in favor of an error message that required networking resources were not found (and maybe a hint to run the ore command).