### Apache Airflow Provider(s)

ssh

### Versions of Apache Airflow Providers

apache-airflow-providers-ssh 2.2.0

### Apache Airflow version

2.1.3

### Operating System

Ubuntu 20.04.2 LTS (Focal Fossa)

### Deployment

Other

### Deployment details

_No response_

### What happened

Specified `command` of SSHOperator to the return value of @task function, it raised AttributeError "'XComArg' object has no attribute 'startswith'".

- DAG
```python
from airflow.decorators import dag, task
from airflow.providers.ssh.operators.ssh import SSHOperator
from airflow.utils.dates import days_ago

DEFAULT_ARGS = {"owner": "airflow"}


# [START example_dag_decorator_ssh_usage]
@dag(default_args=DEFAULT_ARGS, schedule_interval=None, start_date=days_ago(2), tags=['example'])
def example_dag_decorator_ssh():

    @task
    def build_command() -> str:
        return 'whoami'

    command = build_command()

    SSHOperator(
        task_id='run_my_command',
        command=command,
        ssh_conn_id='default_conn',
        retries=0
    )


dag = example_dag_decorator_ssh()
# [END example_dag_decorator_ssh_usage]
```

- Test
```python
import os
import unittest
from glob import glob

from airflow.models import DagBag

ROOT_FOLDER = os.path.realpath(
    os.path.join(os.path.dirname(os.path.realpath(__file__)), os.pardir, os.pardir)
)


class TestExampleDagDecoratorSsh(unittest.TestCase):
    def test_should_be_importable(self):
        dagbag = DagBag(
            dag_folder=f"{ROOT_FOLDER}/airflow/example_dags",
            include_examples=False,
        )
        assert 0 == len(dagbag.import_errors), f"import_errors={str(dagbag.import_errors)}"

```

- Result
```
------------------------------------------------------------------------------------------ Captured log call ------------------------------------------------------------------------------------------
INFO     airflow.models.dagbag.DagBag:dagbag.py:496 Filling up the DagBag from /home/masayuki/git/airflow/airflow/example_dags
ERROR    airflow.models.dagbag.DagBag:dagbag.py:329 Failed to import: /home/masayuki/git/airflow/airflow/example_dags/example_dag_decorator_ssh.py
Traceback (most recent call last):
  File "/home/masayuki/git/airflow/airflow/models/dagbag.py", line 326, in _load_modules_from_file
    loader.exec_module(new_module)
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/home/masayuki/git/airflow/airflow/example_dags/example_dag_decorator_ssh.py", line 26, in <module>
    dag = example_dag_decorator_ssh()
  File "/home/masayuki/git/airflow/airflow/models/dag.py", line 2351, in factory
    f(**f_kwargs)
  File "/home/masayuki/git/airflow/airflow/example_dags/example_dag_decorator_ssh.py", line 18, in example_dag_decorator_ssh
    SSHOperator(
  File "/home/masayuki/git/airflow/airflow/models/baseoperator.py", line 178, in apply_defaults
    result = func(self, *args, **kwargs)
  File "/home/masayuki/git/airflow/airflow/providers/ssh/operators/ssh.py", line 81, in __init__
    self.get_pty = (self.command.startswith('sudo') or get_pty) if self.command else get_pty
AttributeError: 'XComArg' object has no attribute 'startswith'
```

### What you expected to happen

No error

### How to reproduce

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

airflow/providers/ssh/operators/ssh.py
#
#
#
import warnings
from base64 import b64encode
from select import select
from typing import Optional, Tuple, Union
from paramiko.client import SSHClient
from airflow.configuration import conf
from airflow.exceptions import AirflowException
from airflow.models import BaseOperator
from airflow.providers.ssh.hooks.ssh import SSHHook
CMD_TIMEOUT = 10
class SSHOperator(BaseOperator):