### Body

SSHHook uses the default stacklevel (1) in its deprecation warning, it should be 2:
https://github.com/apache/airflow/blob/b11525702c72cb53034aa29ccd6d0e1161ac475c/airflow/providers/ssh/hooks/ssh.py#L433-L439
https://github.com/apache/airflow/blob/b11525702c72cb53034aa29ccd6d0e1161ac475c/airflow/providers/ssh/hooks/ssh.py#L369-L374
https://github.com/apache/airflow/blob/b11525702c72cb53034aa29ccd6d0e1161ac475c/airflow/providers/ssh/hooks/ssh.py#L232-L238

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
"""Create an appropriate Paramiko key for a given private key.
        :param private_key: string containing private key
        :return: ``paramiko.PKey`` appropriate for given key
        :raises AirflowException: if key cannot be read
        """
        if len(private_key.splitlines()) < 2:
            raise AirflowException("Key must have BEGIN and END header/footer on separate lines.")
        for pkey_class in self._pkey_loaders:
            try:
                key = pkey_class.from_private_key(StringIO(private_key), password=passphrase)
                
                
                key.sign_ssh_data(b"")
                return key
            except (paramiko.ssh_exception.SSHException, ValueError):
                continue
        raise AirflowException(
            "Private key provided cannot be read by paramiko."
            "Ensure key provided is valid for one of the following"
            "key formats: RSA, DSS, ECDSA, or Ed25519"
        )
    def exec_ssh_client_command(