Retriable copies for the remote module

[pevogam]

In some cases of network instability (e.g. DNS server reset or similar) if aexpect is in use this will result in possibly job crashing errors like

  File "/usr/lib/python3.13/site-packages/aexpect/remote_door.py", line 308, in run_subcontrol
    remote_control_path = _copy_control(session, control_path)

  File "/usr/lib/python3.13/site-packages/aexpect/remote_door.py", line 283, in _copy_control
    remote.copy_files_to(
    ~~~~~~~~~~~~~~~~~~~~^
        session.host,
        ^^^^^^^^^^^^^
    ...<5 lines>...
        remote_control_path,
        ^^^^^^^^^^^^^^^^^^^^
    )
    ^

  File "/usr/lib/python3.13/site-packages/aexpect/remote.py", line 1378, in transfer
    ret = func(*args, **kwargs)

  File "/usr/lib/python3.13/site-packages/aexpect/remote.py", line 1432, in copy_files_to
    scp_to_remote(
    ~~~~~~~~~~~~~^
        address,
        ^^^^^^^^
    ...<10 lines>...
        interface=interface,
        ^^^^^^^^^^^^^^^^^^^^
    )
    ^

  File "/usr/lib/python3.13/site-packages/aexpect/remote.py", line 755, in scp_to_remote
    return remote_copy(
        command, password_list, log_filename, log_function, timeout
    )

  File "/usr/lib/python3.13/site-packages/aexpect/remote.py", line 696, in remote_copy
    _remote_copy(
    ~~~~~~~~~~~~^
        session, password_list, transfer_timeout, login_timeout, method
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^

  File "/usr/lib/python3.13/site-packages/aexpect/remote.py", line 646, in _remote_copy
    raise SCPError("SCP client said 'lost connection'", text)

I think it might be a good idea if the remote copy operations support a number of (re)tries (with default tries=1). This will make using aexpect's remote layer in automation more resilient.