Add goleak to all tests (#227)

* Run goleak as part of all tests
We are already using goleak in various tests.
This commit adds a TestMain to all remaining tests
and calls goleak.VerifyTestMain in them.
* Add goleak to debugd/deploy package and fix bug.
* Run go mod tidy
* Fix integration tests
* Move goleak invocation for mount integration test
* Ignore leak in state integration tests

Co-authored-by: Fabian Kammel <fk@edgelss.systems>

coordinator/kubernetes/k8sapi/kubectl/kubectl_test.go

@@ -6,9 +6,14 @@ import (
 
 	"github.com/edgelesssys/constellation/coordinator/kubernetes/k8sapi/resources"
 	"github.com/stretchr/testify/assert"
+	"go.uber.org/goleak"
 	"k8s.io/cli-runtime/pkg/resource"
 )
 
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}
+
 type stubClient struct {
 	applyOneObjectErr error
 	getObjectsInfos   []*resource.Info