Fix golangci-lint violations

This PR fixed golangci-lint violations in status_manager_test.go which
would make all PR fail on the current CI. I'm ignoring staticcheck on
that file rather than ignoring only the specific SA1019 as per this [1]
issue on golangci-lint.

[1] golangci/golangci-lint#741

pkg/controller/statusmanager/status_manager_test.go

@@ -1,5 +1,6 @@
 package statusmanager
 
+//nolint:staticcheck
 import (
 	"context"
 	"encoding/json"