Move remainder integration tests to use golang native tests

[unmarshall]

How to categorize this issue?

/area dev-productivity
/area testing
/kind technical-debt
/kind test

What would you like to be added:

• Add golang native IT tests for secrets controller
• Add golang native IT tests for compaction controller
• Add golang native IT tests for etcdcopybacktask controller

NOTE: For each controller do not just copy the existing tests but define a comprehensive suite of Integration tests first and then code them. The current set of IT tests are either not correct or are very less.

Why is this needed:

We started to move away from Ginkgo for writing integration tests in #777. Only etcd controller reconciler IT tests were migrated to using native golang tests. We should harmonize and move the remaining controller IT tests to using golang native test framework.