### Body

Similarly to SFTP (fixed in https://github.com/apache/airflow/pull/29068) the logic from __init__ should be moved to execute.

The #29068 provides a blueprint for that.

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
local_filepath = ["/tmp/ltest1", "/tmp/ltest2"]
        remote_filepath = ["/tmp/rtest1", "/tmp/rtest2"]
        ftps_op = FTPSFileTransmitOperator(
            task_id="test_multiple_paths_get",
            ftp_conn_id=DEFAULT_CONN_ID,
            local_filepath=local_filepath,
            remote_filepath=remote_filepath,
            operation=FTPOperation.GET,
        )
        ftps_op.execute(None)
        assert mock_get.call_count == 2
        for count, (args, _) in enumerate(mock_get.call_args_list):
            assert args == (remote_filepath[count], local_filepath[count])
    @mock.patch("airflow.providers.ftp.operators.ftp.FTPSHook.store_file")
    def test_multiple_paths_put(self, mock_put):
        local_filepath = ["/tmp/ltest1", "/tmp/ltest2"]
        remote_filepath = ["/tmp/rtest1", "/tmp/rtest2"]
        ftps_op = FTPSFileTransmitOperator(
            task_id="test_multiple_paths_put",
            ftp_conn_id=DEFAULT_CONN_ID,
            local_filepath=local_filepath,
            remote_filepath=remote_filepath,
            operation=FTPOperation.PUT,
        )
        ftps_op.execute(None)
        assert mock_put.call_count == 2
        for count, (args, _) in enumerate(mock_put.call_args_list):
            assert args == (remote_filepath[count], local_filepath[count])