fix: add secret only when not in secret file (zalando#2732)

* fix: add secret only when not in secret file
* fix indentation

---------

Co-authored-by: Felix Kunde <[email protected]>

Author: nickmansrob

Diff for: pkg/cluster/k8sres.go

@@ -2481,7 +2481,9 @@ func (c *Cluster) generateLogicalBackupPodEnvVars() []v1.EnvVar {
 		}
 
 	case "gcs":
-		envVars = append(envVars, v1.EnvVar{Name: "LOGICAL_BACKUP_GOOGLE_APPLICATION_CREDENTIALS", Value: c.OpConfig.LogicalBackup.LogicalBackupGoogleApplicationCredentials})
+		if c.OpConfig.LogicalBackup.LogicalBackupGoogleApplicationCredentials != "" {
+			envVars = append(envVars, v1.EnvVar{Name: "LOGICAL_BACKUP_GOOGLE_APPLICATION_CREDENTIALS", Value: c.OpConfig.LogicalBackup.LogicalBackupGoogleApplicationCredentials})
+		}
 
 	case "az":
 		envVars = appendEnvVars(envVars, []v1.EnvVar{
@@ -2492,11 +2494,11 @@ func (c *Cluster) generateLogicalBackupPodEnvVars() []v1.EnvVar {
 			{
 				Name:  "LOGICAL_BACKUP_AZURE_STORAGE_CONTAINER",
 				Value: c.OpConfig.LogicalBackup.LogicalBackupAzureStorageContainer,
-			},
-			{
-				Name:  "LOGICAL_BACKUP_AZURE_STORAGE_ACCOUNT_KEY",
-				Value: c.OpConfig.LogicalBackup.LogicalBackupAzureStorageAccountKey,
 			}}...)
+
+		if c.OpConfig.LogicalBackup.LogicalBackupAzureStorageAccountKey != "" {
+			envVars = append(envVars, v1.EnvVar{Name: "LOGICAL_BACKUP_AZURE_STORAGE_ACCOUNT_KEY", Value: c.OpConfig.LogicalBackup.LogicalBackupAzureStorageAccountKey})
+		}
 	}
 
 	return envVars