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>

activation/kms/kms_test.go

@@ -8,6 +8,7 @@ import (
 	"github.com/edgelesssys/constellation/internal/logger"
 	"github.com/edgelesssys/constellation/kms/kmsproto"
 	"github.com/stretchr/testify/assert"
+	"go.uber.org/goleak"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/test/bufconn"
 )
@@ -21,6 +22,10 @@ func (c *stubClient) GetDataKey(context.Context, *kmsproto.GetDataKeyRequest, *g
 	return &kmsproto.GetDataKeyResponse{DataKey: c.dataKey}, c.getDataKeyErr
 }
 
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}
+
 func TestGetDataKey(t *testing.T) {
 	testCases := map[string]struct {
 		client  *stubClient