Adding `get_size_on_remote` to the `Transport` interface

[GeigerJ2]

As noted during discussions with the core office, @agoscinski, @khsrali, @unkcpz, on #6584:
It would be nice if the Transport could implement a method such as get_size or get_size_on_remote to which a path can be provided (as well as additional endpoints, if we think of more in the future).

In #6584, some custom logic to be added because FirecREST doesn't support arbitrary command execution and the aiida-firecrest transport/scheduler plugin therefore doesn't have an exec_command_wait method. However, this seems to be more a concern of the transport. As this change would require adding to the abstract interface of Transport, as well as implementing the methods it in its subclasses, just putting out the issue here as a reminder for the future for now.

[khsrali]

transport.du() 🥇

[unkcpz]

#6584 is merged, this one can be closed.

[khsrali]

@unkcpz I'm not sure that would close this issue,
I think this was mainly for future concerns and more like a feature request for transport plugins. @GeigerJ2 am I right?

[unkcpz]

Ah, right I didn't read the description carefully. reopen.

[ayushjariyal]

@GeigerJ2 Is this issue still open? If so, I would like to work on it.

[khsrali]

@ayushjariyal This issue, is more for documenting reasons, and I don't think if there is a high priority to solve it.

It seems you are interested to solve something on transport plugins which you are making yourself familiar with.
Then perhaps maybe look into this instead:
#6751

[ayushjariyal]

Thank you for the clarification. I will definitely try working on that issue.

[GeigerJ2]

Thanks, @khsrali, for chipping in! Nothing to add here, this issue is just for keeping track of the idea.