[renovate] Update golangci/golangci-lint Docker tag to v1.59.0

This MR contains the following updates:

Package	Type	Update	Change
golangci/golangci-lint	image	minor	v1.58.1-alpine -> v1.59.0-alpine

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controller/nucleus/networkElementServiceMock.go

 package nucleus
 
 import (
+	"code.fbi.h-da.de/danet/gosdn/controller/customerrs"
 	"code.fbi.h-da.de/danet/gosdn/controller/interfaces/networkelement"
 	"code.fbi.h-da.de/danet/gosdn/controller/store"
 	"github.com/google/uuid"
@@ -66,12 +67,12 @@ func (t *NetworkElementServiceMock) Get(query store.Query) (networkelement.Netwo
 		// Second search for name
 		id, ok := t.nameLookupTable[query.Name]
 		if !ok {
-			return nil, nil
+			return nil, customerrs.CouldNotFindError{Name: query.Name}
 		}
 
 		item, ok := t.Store[id]
 		if !ok {
-			return nil, nil
+			return nil, customerrs.CouldNotFindError{ID: id}
 		}
 
 		return item, nil