fix(core): Fix import:workflow command (n8n-io#6996)

Ref: https://github.com/n8n-io/n8n/actions/runs/5946170960

To test:

```sh
./packages/cli/bin/n8n export:workflow --all --output=./all-workflows.json
./packages/cli/bin/n8n import:workflow --input=./all-workflows.json
```

packages/cli/src/commands/import/workflow.ts

@@ -65,11 +65,12 @@ export class ImportWorkflowsCommand extends BaseCommand {
 
 	private transactionManager: EntityManager;
 
-	private tagService = Container.get(TagService);
+	private tagService: TagService;
 
 	async init() {
 		disableAutoGeneratedIds(WorkflowEntity);
 		await super.init();
+		this.tagService = Container.get(TagService);
 	}
 
 	async run(): Promise<void> {