Workload should wait till projects are terminated

[chaitanyaenr]

The workloads need to make sure to wait till all the objects created by it are terminated to determine if the test passed/failed since we observed in CI runs that the projects were stuck in terminated meaning the cluster is unhealthy and the next test in the pipeline run is no longer valid/has high chances of failure.

It might be difficult to use --wait=true during project deletion as it's a serial operation in case of workloads creating thousands of projects like Master Vertical and Namespaces per cluster but we can start by making sure the workloads which creates < 100 projects use --wait=true during the cleanup for example HTTP workload - https://github.com/openshift-scale/workloads/blob/master/workloads/files/workload-http-script-cm.yml#L621.