**Apache Airflow version**: 2.0.1


**Kubernetes version (if you are using kubernetes)** (use `kubectl version`): No

**Environment**:

- **Cloud provider or hardware configuration**: local machine
- **OS** (e.g. from /etc/os-release): 18.04.5 LTS (Bionic Beaver)
- **Kernel** (e.g. `uname -a`): wsl2

**What happened**:
Getting Pickled_id: None

```
root@12c7fd58e084:/opt/airflow# airflow tasks run example_bash_operator runme_0 now --ship-dag --interactive
[2021-05-09 13:11:33,247] {dagbag.py:487} INFO - Filling up the DagBag from /files/dags
Running <TaskInstance: example_bash_operator.runme_0 2021-05-09T13:11:31.788923+00:00 [None]> on host 12c7fd58e084
Pickled dag <DAG: example_bash_operator> as pickle_id: None
Sending to executor.
[2021-05-09 13:11:34,722] {base_executor.py:82} INFO - Adding to queue: ['airflow', 'tasks', 'run', 'example_bash_operator', 'runme_0', '2021-05-09T13:11:31.788923+00:00', '--local', '--pool', 'default_pool', '--subdir', '/opt/airflow/airflow/example_dags/example_bash_operator.py']
[2021-05-09 13:11:34,756] {local_executor.py:81} INFO - QueuedLocalWorker running ['airflow', 'tasks', 'run', 'example_bash_operator', 'runme_0', '2021-05-09T13:11:31.788923+00:00', '--local', '--pool', 'default_pool', '--subdir', '/opt/airflow/airflow/example_dags/example_bash_operator.py']
[2021-05-09 13:11:34,757] {local_executor.py:386} INFO - Shutting down LocalExecutor; waiting for running tasks to finish.  Signal again if you don't want to wait.
[2021-05-09 13:11:34,817] {dagbag.py:487} INFO - Filling up the DagBag from /opt/airflow/airflow/example_dags/example_bash_operator.py
Running <TaskInstance: example_bash_operator.runme_0 2021-05-09T13:11:31.788923+00:00 [None]> on host 12c7fd58e084
```

**What you expected to happen**:

Pickled_id should get generated 

```
Pickled dag <DAG: example_bash_operator> as pickle_id: None
```

**How to reproduce it**:
run below command from command line in airflow environment
```
airflow tasks run example_bash_operator runme_0 now --ship-dag --interactive
```
**Would like to submit PR for this issue**: YES


airflow/cli/commands/task_command.py
"""
    Sends the task to the executor for execution. This can result in the task being started by another host
    if the executor implementation does
    """
    pickle_id = None
    if args.ship_dag:
        try:
            
            with create_session() as session:
                pickle = DagPickle(dag)
                session.add(pickle)
                pickle_id = pickle.id
                
                print(f'Pickled dag {dag} as pickle_id: {pickle_id}')
        except Exception as e:
            print('Could not pickle the DAG')
            print(e)
            raise e
    executor = ExecutorLoader.get_default_executor()
    executor.job_id = "manual"
    executor.start()
    print("Sending to executor.")
    executor.queue_task_instance(
        ti,
        mark_success=args.mark_success,
        pickle_id=pickle_id,
        ignore_all_deps=args.ignore_all_dependencies,
        ignore_depends_on_past=args.ignore_depends_on_past,