e2e: simplify test cleanup

ginkgo.DeferCleanup has multiple advantages:
- The cleanup operation can get registered if and only if needed.
- No need to return a cleanup function that the caller must invoke.
- Automatically determines whether a context is needed, which will
  simplify the introduction of context parameters.
- Ginkgo's timeline shows when it executes the cleanup operation.

test/e2e_node/topology_manager_test.go

@@ -910,7 +910,7 @@ func runTopologyManagerTests(f *framework.Framework) {
 		framework.ExpectNoError(err)
 
 		sd := setupSRIOVConfigOrFail(f, configMap)
-		defer teardownSRIOVConfigOrFail(f, sd)
+		ginkgo.DeferCleanup(teardownSRIOVConfigOrFail, f, sd)
 
 		scope := containerScopeTopology
 		for _, policy := range policies {