Move cloud metadata packages and kubernetes resources marshaling to internal

Decouples cloud provider metadata packages from kubernetes related code

Signed-off-by: Malte Poll <mp@edgeless.systems>

internal/cloud/gcp/logger.go

@@ -0,0 +1,45 @@
+package gcp
+
+import (
+	"context"
+	"log"
+
+	"cloud.google.com/go/logging"
+	"github.com/edgelesssys/constellation/internal/gcpshared"
+)
+
+type Logger struct {
+	client *logging.Client
+	logger *log.Logger
+}
+
+// NewLogger creates a new Cloud Logger for GCP.
+// https://cloud.google.com/logging/docs/setup/go
+func NewLogger(ctx context.Context, providerID string, logName string) (*Logger, error) {
+	projectID, _, _, err := gcpshared.SplitProviderID(providerID)
+	if err != nil {
+		return nil, err
+	}
+	client, err := logging.NewClient(ctx, projectID)
+	if err != nil {
+		return nil, err
+	}
+
+	logger := client.Logger(logName).StandardLogger(logging.Info)
+
+	return &Logger{
+		client: client,
+		logger: logger,
+	}, nil
+}
+
+// Disclose stores log information in GCP Cloud Logging! Do **NOT** log sensitive
+// information!
+func (l *Logger) Disclose(msg string) {
+	l.logger.Println(msg)
+}
+
+// Close waits for all buffer to be written.
+func (l *Logger) Close() error {
+	return l.client.Close()
+}