### Description

Following #29282, command timeout is set at the `SSHHook` level while it used to be able to set at the `SSHOperator` level.

I will work on a PR as soon as i can.

### Use case/motivation

Ideally, i think we could have a default value set on `SSHHook`, but with the possibility of overriding it at the `SSHOperator` level.

### Related issues

#29282 

### Are you willing to submit a PR?

- [X] 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)

hook = SSHHook(ssh_conn_id="ssh_default")
        with hook.get_conn() as client:
            (_, stdout, _) = client.exec_command("ls")
            assert stdout.read() is not None
    def test_ssh_connection_no_connection_id(self):
        hook = SSHHook(remote_host="localhost")
        assert hook.ssh_conn_id is None
        with hook.get_conn() as client:
            (_, stdout, _) = client.exec_command("ls")
            assert stdout.read() is not None
    def test_ssh_connection_old_cm(self):